How to stop firefox from making automatic connections

DNS prefetching

In order to reduce latency, Firefox will proactively perform domain name resolution on links that the user may choose to follow as well as URLs for items referenced by elements in a web page. For more information, please see the DNS Prefetching blog post. To disable DNS prefetching:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference network.dns.disablePrefetch.
3. Observe the Value column of the network.dns.disablePrefetch row.
   • If it is set to true then do nothing.
   • If it is set to false, double-click on it to set it to true.

Add-on metadata updating

The Add-ons manager displays information about each add-on you have installed and provides personalized recommendations in the Get Add-ons panel. To keep this data updated, Firefox will request information from the Mozilla Add-ons gallery once a day (for more information, see this blog post). To disable these updates:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.getAddons.cache.enabled.
3. Observe the Value column of the extensions.getAddons.cache.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Diagnostics

Firefox can submit certain diagnostics data, including Telemetry and Crash Reports data to Mozilla, to provide information that helps improve the browser. You can disable sharing of this data in Firefox OptionsPreferencesSettings
. To disable the sharing of this data:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.
2. Select the Privacy & Security panel.
3. Uncheck the boxes under the section, Firefox Data Collection and Use.

In addition, Mozilla will ask a small sample of users to rate their experience with Firefox to get a better insight into the sentiment about the browser. For more information about this see https://wiki.mozilla.org/Advocacy/heartbeat. The rating feature will establish a connection to Mozilla’s servers at startup, which you can turn off like this:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. Find the preference app.normandy.enabled.
3. Set the preference value to false by double clicking on it.

Auto-update checking

Warning: Disabling update checking is not recommended and will leave you open to security vulnerabilities that get fixed in newer versions.

Firefox occasionally checks to see if any updates are available for itself and for your search engines. The ability to disable Firefox update checking was removed in Firefox 63. Advanced users and IT administrators can use a policy to disable Firefox update checks. See Managing Firefox Updates.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Blocklist updating

Warning: Disabling the blocklist is not recommended, as it may result in you using untrustworthy add-ons, revoked certificates or unstable graphics drivers.

Firefox may be updating its blocklist, which is used to block malicious extensions, vulnerable plugins, revoked certificates and graphics drivers known to cause crashes. For more information, see Blocklisting (MozillaWiki), Blocklisting/Graphics (MozillaWiki), the Revoking Intermediate Certificates: Introducing OneCRL blog post and the article Add-ons that cause stability or security issues are put on a blocklist. To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.blocklist.enabled.
3. Observe the Value column of the extensions.blocklist.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Blocklist updating

Warning: Disabling the blocklist is not recommended, as it may result in you using untrustworthy add-ons, revoked certificates or unstable graphics drivers.

Firefox may be updating its blocklist, which is used to block malicious extensions, vulnerable plugins, revoked certificates and graphics drivers known to cause crashes. For more information, see Blocklisting (MozillaWiki), Blocklisting/Graphics (MozillaWiki), the Revoking Intermediate Certificates: Introducing OneCRL blog post and the article Add-ons that cause stability or security issues are put on a blocklist. To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.blocklist.enabled.
3. Observe the Value column of the extensions.blocklist.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Auto-update checking

Warning: Disabling update checking is not recommended and will leave you open to security vulnerabilities that get fixed in newer versions.

Firefox occasionally checks to see if any updates are available for itself and for your search engines. The ability to disable Firefox update checking was removed in Firefox 63. Advanced users and IT administrators can use a policy to disable Firefox update checks. See Managing Firefox Updates.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Send Video To Device

Firefox contains a «Send Video To Device» feature that is disabled by default, to send HTML5 video content to a Roku, Chromecast or similar device in the same network. When this feature is enabled, Firefox will send SSDP packages (Simple Service Discovery Protocol, multicast address 239.255.255.250, port 1900) to the local network, to discover and pair with such a device. This can trigger a firewall dialog asking you if you want to allow such connections.

To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference browser.casting.enabled.
3. Observe the Value column of the browser.casting.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Anti-phishing and malware protection lists updating

Warning: Disabling phishing and malware protection is not recommended, as it will leave you vulnerable to malicious or unwanted downloads and to untrustworthy websites that try to steal your financial information and/or your identity.

Phishing, unwanted software and malware protection lists may be updating. To turn this off:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. Uncheck Block dangerous and deceptive content.

In addition, when you download an application file, Firefox will verify its signature. If it is signed, Firefox then compares the signature with a list of known safe publishers. For files that are not identified by the lists as “safe” (allowed) or as “malware” (blocked), Firefox asks Google’s Safe Browsing service if the software is safe by sending it some of the download’s metadata. To turn off this part of malware protection:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference browser.safebrowsing.downloads.remote.enabled.
3. Observe the Value Column of the browser.safebrowsing.downloads.remote.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true then double-click on it to set it to false.

Secure website certificates

When you visit a secure website (i.e. «https»), Firefox will validate the website’s certificate. This may involve communicating with a third-party status provider specified by the certificate over a protocol named OCSP to confirm that the certificate is still valid. To turn this off:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. In the Security section under Certificates, uncheck Query OCSP responder servers to confirm the current validity of certificates.

Запрос разрешения на использование данных о вашем местоположении

При первой попытке получить данные о вашей геопозиции приложение запросит разрешение. Вы увидите сведения о приложении, которое запрашивает доступ к вашей геопозиции, а также о причине, по которой требуется такой доступ.

Некоторым приложениям доступ к геопозиции требуется только при их использовании. Приложение считается «используемым», если вы работаете с ним в активном режиме или если оно использует данные о геопозиции в фоновом режиме. Во втором случае в строке состояния будет отображаться синий индикатор.

Если вы предоставили приложению разрешение «Используя», оно может запросить разрешение на использование данных о вашей геопозиции при работе в фоновом режиме.

Если вы разрешаете приложению использовать данные о вашей геопозиции в фоновом режиме, ваше устройство будет время от времени напоминать вам о том, что приложение использует данные о вашей геопозиции, и отображать эти сведения на карте. Также появится запрос, следует ли по-прежнему разрешать приложению использовать данные о вашей геопозиции при работе в фоновом режиме.

В iOS 13 и iPadOS 13 можно нажать «Разрешить один раз», чтобы приложение получило доступ к данным о геопозиции только при одном сеансе работы (один раз). Если вы закроете приложение, а потом запустите его снова, и оно снова попытается получить доступ к данным о вашей геопозиции, запрос будет выведен ещё раз. Приложения не будут использовать данные о вашей геопозиции, пока не запросят (и не получат) ваше разрешение.

Вы можете передумать в любое время и обновить свои настройки в меню «Настройки» «Конфиденциальность» > «Службы геолокации». Службы геолокации можно включить при первоначальной настройке устройства в приложении «Ассистент настройки» или в любое время с помощью параметра «Службы геолокации». Доступ к данным служб геолокации можно настроить индивидуально для каждого приложения и системной службы. Если службы геолокации отключены, приложения не могут использовать данные о вашей геопозиции независимо от того, в каком режиме они работают: активном или фоновом. Это ограничит возможности многих приложений Apple и сторонних разработчиков.

Если вы хотите сбросить все настройки геолокации до заводских по умолчанию, перейдите в меню «Настройки» > «Основные» > «Сброс» и нажмите «Сбросить геонастройки». После сброса настроек геолокации и конфиденциальности приложения прекратят использовать данные о вашем местоположении, пока вы не дадите им на это разрешение.

«Настройки» > «Конфиденциальность» > «Службы геолокации».

«Настройки» > «Конфиденциальность» > «Службы геолокации» > «Системные службы».

Blocklist updating

Warning: Disabling the blocklist is not recommended, as it may result in you using untrustworthy add-ons, revoked certificates or unstable graphics drivers.

Firefox may be updating its blocklist, which is used to block malicious extensions, vulnerable plugins, revoked certificates and graphics drivers known to cause crashes. For more information, see Blocklisting (MozillaWiki), Blocklisting/Graphics (MozillaWiki), the Revoking Intermediate Certificates: Introducing OneCRL blog post and the article Add-ons that cause stability or security issues are put on a blocklist. To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.blocklist.enabled.
3. Observe the Value column of the extensions.blocklist.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Auto-update checking

Warning: Disabling update checking is not recommended and will leave you open to security vulnerabilities that get fixed in newer versions.

Firefox occasionally checks to see if any updates are available for itself and for your search engines. The ability to disable Firefox update checking was removed in Firefox 63. Advanced users and IT administrators can use a policy to disable Firefox update checks. See Managing Firefox Updates.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Add-on metadata updating

The Add-ons manager displays information about each add-on you have installed and provides personalized recommendations in the Get Add-ons panel. To keep this data updated, Firefox will request information from the Mozilla Add-ons gallery once a day (for more information, see this blog post). To disable these updates:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.getAddons.cache.enabled.
3. Observe the Value column of the extensions.getAddons.cache.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Diagnostics

Firefox can submit certain diagnostics data, including Telemetry and Crash Reports data to Mozilla, to provide information that helps improve the browser. You can disable sharing of this data in Firefox OptionsPreferencesSettings
. To disable the sharing of this data:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. Uncheck the boxes under the section, Firefox Data Collection and Use.

In addition, Mozilla will ask a small sample of users to rate their experience with Firefox to get a better insight into the sentiment about the browser. For more information about this see https://wiki.mozilla.org/Advocacy/heartbeat. The rating feature will establish a connection to Mozilla’s servers at startup, which you can turn off like this:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

   

   

   

   

   

   

   

   

   

   

2. Find the preference app.normandy.enabled.
3. Set the preference value to false by double clicking on it.

Blocklist updating

Warning: Disabling the blocklist is not recommended, as it may result in you using untrustworthy add-ons, revoked certificates or unstable graphics drivers.

Firefox may be updating its blocklist, which is used to block malicious extensions, vulnerable plugins, revoked certificates and graphics drivers known to cause crashes. For more information, see Blocklisting (MozillaWiki), Blocklisting/Graphics (MozillaWiki), the Revoking Intermediate Certificates: Introducing OneCRL blog post and the article Add-ons that cause stability or security issues are put on a blocklist. To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.blocklist.enabled.
3. Observe the Value column of the extensions.blocklist.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

DNS prefetching

In order to reduce latency, Firefox will proactively perform domain name resolution on links that the user may choose to follow as well as URLs for items referenced by elements in a web page. For more information, please see the DNS Prefetching blog post. To disable DNS prefetching:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference network.dns.disablePrefetch.
3. Observe the Value column of the network.dns.disablePrefetch row.
   • If it is set to true then do nothing.
   • If it is set to false, double-click on it to set it to true.

WebRTC

WebRTC (Web Real-Time Communication) is a technology which provides direct browser-to-browser communication (audio, video, filesharing). As it is drafted and implemented at the moment, WebRTC can lead to your local IP address being exposed to websites even when you are behind a VPN or a NAT router — in the WebRTC API this data would be used to set up a peer-to-peer connection between two local clients.

For different methods and granular controls on how to mitigate this issue, see Media/WebRTC/Privacy Mozilla Wiki page.

Send Video To Device

Firefox contains a «Send Video To Device» feature that is disabled by default, to send HTML5 video content to a Roku, Chromecast or similar device in the same network. When this feature is enabled, Firefox will send SSDP packages (Simple Service Discovery Protocol, multicast address 239.255.255.250, port 1900) to the local network, to discover and pair with such a device. This can trigger a firewall dialog asking you if you want to allow such connections.

To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference browser.casting.enabled.
3. Observe the Value column of the browser.casting.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Network Detection

Firefox’s captive portal feature tests whether your network connection requires logging in, for example, on a public wi-fi hotspot, by regularly connecting to http://detectportal.firefox.com/success.txt. Firefox will also make connections to this URL to check if your current network supports IPv6.

To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference network.captive-portal-service.enabled (for example, you can type portal in the search box above the list and pause while the list is filtered).
3. Observe the Value column of the network.captive-portal-service.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.
4. In the about:config page, search for the preference network.connectivity-service.enabled (for example, you can type connectivity in the search box above the list and pause while the list is filtered).
5. Observe the Value column of the network.connectivity-service.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Malware

If your computer is infected with a virus, trojan, spyware, or other malicious software, then Firefox’s Internet connection may be being piggybacked in order for the malware to communicate with its author or to deliver advertisements, etc. If you suspect this is the case, consider seeking advice from a forum specializing in malware removal. For more information, see Troubleshoot Firefox issues caused by malware.

Loopback connection

Note: This does not apply to Linux systems.

A loopback connection (to IP address 127.0.0.1) can be made by Firefox on non-Unix machines. In this case the browser is communicating with itself as expected, and it is not recommended that this communication be blocked. See bug 100154 for more information.

Extensions

An extension you have installed may be making a connection to a website that it relies on. For example, a connection to a website to synchronize your bookmarks, a connection to a website to update a list of sites to block, etc. Or it is possible an extension could be changing the expected behavior of Firefox in other ways. For example, FasterFox extension has an option to prefetch all links.
To disable or remove your extensions, see the Disable or remove Add-ons article.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

Warning: Disabling add-on update checking is not recommended and leaves you open to security vulnerabilities that get fixed in newer versions.

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Add-on metadata updating

The Add-ons manager displays information about each add-on you have installed and provides personalized recommendations in the Get Add-ons panel. To keep this data updated, Firefox will request information from the Mozilla Add-ons gallery once a day (for more information, see this blog post). To disable these updates:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference extensions.getAddons.cache.enabled.
3. Observe the Value column of the extensions.getAddons.cache.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Diagnostics

Firefox can submit certain diagnostics data, including Telemetry and Crash Reports data to Mozilla, to provide information that helps improve the browser. You can disable sharing of this data in Firefox OptionsPreferencesSettings
. To disable the sharing of this data:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. Uncheck the boxes under the section, Firefox Data Collection and Use.

In addition, Mozilla will ask a small sample of users to rate their experience with Firefox to get a better insight into the sentiment about the browser. For more information about this see https://wiki.mozilla.org/Advocacy/heartbeat. The rating feature will establish a connection to Mozilla’s servers at startup, which you can turn off like this:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. Find the preference app.normandy.enabled.
3. Set the preference value to false by double clicking on it.

Send Video To Device

Firefox contains a «Send Video To Device» feature that is disabled by default, to send HTML5 video content to a Roku, Chromecast or similar device in the same network. When this feature is enabled, Firefox will send SSDP packages (Simple Service Discovery Protocol, multicast address 239.255.255.250, port 1900) to the local network, to discover and pair with such a device. This can trigger a firewall dialog asking you if you want to allow such connections.

To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference browser.casting.enabled.
3. Observe the Value column of the browser.casting.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Extensions

An extension you have installed may be making a connection to a website that it relies on. For example, a connection to a website to synchronize your bookmarks, a connection to a website to update a list of sites to block, etc. Or it is possible an extension could be changing the expected behavior of Firefox in other ways. For example, FasterFox extension has an option to prefetch all links.
To disable or remove your extensions, see the Disable or remove Add-ons article.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

Warning: Disabling add-on update checking is not recommended and leaves you open to security vulnerabilities that get fixed in newer versions.

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Auto-update checking

Warning: Disabling update checking is not recommended and will leave you open to security vulnerabilities that get fixed in newer versions.

Firefox occasionally checks to see if any updates are available for itself and for your search engines. The ability to disable Firefox update checking was removed in Firefox 63. Advanced users and IT administrators can use a policy to disable Firefox update checks. See Managing Firefox Updates.

Firefox also checks to see if any updates are available for your add-ons (extensions, themes). To disable this check:

1. Click the menu button , click Add-ons and Themes Add-ons and Themes Add-ons and select Extensions.

2. At the top of the tab, click the «Tools for all add-ons» menu, uncheck Update Add-ons Automatically and then select Reset All Add-ons to Update Automatically.

Blocklist updating

Warning: Disabling the blocklist is not recommended, as it may result in you using untrustworthy add-ons, revoked certificates or unstable graphics drivers.

Firefox may be updating its blocklist, which is used to block malicious extensions, vulnerable plugins, revoked certificates and graphics drivers known to cause crashes. For more information, see Blocklisting (MozillaWiki), Blocklisting/Graphics (MozillaWiki), the Revoking Intermediate Certificates: Introducing OneCRL blog post and the article Add-ons that cause stability or security issues are put on a blocklist. To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

   

   

   

   

   

   

   

   

   

   

2. In the about:config page, search for the preference extensions.blocklist.enabled.
3. Observe the Value column of the extensions.blocklist.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Tracking protection list updating

The tracking protection list may be updating itself. To turn this off:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select thePrivacy & Security panel.
3. Under Content Blocking, choose the Custom setting.
4. Uncheck Trackers.

The tracking protection list may be updating itself. To turn this off:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. Under Enhanced Tracking Protection, choose the Custom setting.
4. Uncheck Tracking content.

Send Video To Device

Firefox contains a «Send Video To Device» feature that is disabled by default, to send HTML5 video content to a Roku, Chromecast or similar device in the same network. When this feature is enabled, Firefox will send SSDP packages (Simple Service Discovery Protocol, multicast address 239.255.255.250, port 1900) to the local network, to discover and pair with such a device. This can trigger a firewall dialog asking you if you want to allow such connections.

To disable this feature:

1. Type about:config in the address bar and press EnterReturn.A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.

2. In the about:config page, search for the preference browser.casting.enabled.
3. Observe the Value column of the browser.casting.enabled row.
   • If it is set to false then do nothing.
   • If it is set to true, double-click on it to set it to false.

Secure website certificates

When you visit a secure website (i.e. «https»), Firefox will validate the website’s certificate. This may involve communicating with a third-party status provider specified by the certificate over a protocol named OCSP to confirm that the certificate is still valid. To turn this off:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.
   Click the menu button and select OptionsPreferences.Click the menu button and select Settings.

2. Select the Privacy & Security panel.
3. In the Security section under Certificates, uncheck Query OCSP responder servers to confirm the current validity of certificates.