Mozilla Firefox ESR pt-PT x86 Version 140.4.0
140.4.0$$$Firefox ESR$$$October 14; 2025$$$$$$Version 140.4.0; first offered to ESR channel users on October 14; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.$$$$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 140.3.1
140.3.1$$$Firefox ESR$$$September 23; 2025$$$$$$Version 140.3.1; first offered to ESR channel users on September 23; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.
Mozilla Firefox ESR pt-PT x86 Version 140.3.1
140.3.1$$$Firefox ESR$$$September 23; 2025$$$$$$Version 140.3.1; first offered to ESR channel users on September 23; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.
Mozilla Firefox ESR pt-PT x86 Version 140.2.0
140.2.0$$$Firefox ESR$$$August 19; 2025$$$$$$Version 140.2.0; first offered to ESR channel users on August 19; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 140.2.0
140.2.0$$$Firefox ESR$$$August 19; 2025$$$$$$Version 140.2.0; first offered to ESR channel users on August 19; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 140.1.0
140.1.0$$$Firefox ESR$$$July 22; 2025$$$$$$Version 140.1.0; first offered to ESR channel users on July 22; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.$$$$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 140.1.0
140.1.0$$$Firefox ESR$$$July 22; 2025$$$$$$Version 140.1.0; first offered to ESR channel users on July 22; 2025$$$Firefox 140 Extended Support Release (ESR) includes all of the enhancements since Firefox 128; along with many new features to make your enterprise deployments easier and even more flexible.$$$$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 140.0
140.0$$$Firefox Release$$$June 24; 2025$$$$$$Version 140.0; first offered to Release channel users on June 24; 2025$$$$$$New$$$Vertical Tabs: You can now keep more — or fewer — pinned tabs in view for quicker access to important windows. Just drag the divider to resize your pinned tabs section.$$$$$$screenshot Firefox browser with the sidebar enabled; demonstrating the divider for pinned tabs$$$$$$Custom Search Engines: Firefox now supports adding even more search engines. To add a custom engine; right-click a search field of a supported website and select “Add Search Engine”; or go to Settings > Search > Add (below the search shortcuts table) to manually enter a search URL.$$$$$$Firefox Extensions: Customize your toolbar with the option to remove the extensions shortcut; giving you more control over your browser. When the button is hidden; you can access the extensions panel again at any time from the Firefox menu by clicking the Extensions menu item.$$$$$$You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting Unload Tab. This can speed up performance by reducing Firefoxs memory and CPU usage.$$$$$$Full-Page Translations now prioritizes translating only the content near your current view; improving speed and responsiveness. Content outside your view is skipped unless you scroll to it; reducing unnecessary resource usage.$$$$$$Firefox builds in Arabic now come with a built-in Arabic dictionary for the Firefox spellchecker.$$$$$$Address autofill enabled for users in Italy; Poland; and Austria.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$The Pocket toolbar icon; as well as the Pocket integrations on New Tab; have been removed per the service shutdown announcement.
Mozilla Firefox ESR pt-PT x86 Version 140.0
140.0$$$Firefox Release$$$June 24; 2025$$$$$$Version 140.0; first offered to Release channel users on June 24; 2025$$$$$$New$$$Vertical Tabs: You can now keep more — or fewer — pinned tabs in view for quicker access to important windows. Just drag the divider to resize your pinned tabs section.$$$$$$screenshot Firefox browser with the sidebar enabled; demonstrating the divider for pinned tabs$$$$$$Custom Search Engines: Firefox now supports adding even more search engines. To add a custom engine; right-click a search field of a supported website and select “Add Search Engine”; or go to Settings > Search > Add (below the search shortcuts table) to manually enter a search URL.$$$$$$Firefox Extensions: Customize your toolbar with the option to remove the extensions shortcut; giving you more control over your browser. When the button is hidden; you can access the extensions panel again at any time from the Firefox menu by clicking the Extensions menu item.$$$$$$You can now unload tabs by right-clicking on a tab (or multiple selected tabs) and selecting Unload Tab. This can speed up performance by reducing Firefoxs memory and CPU usage.$$$$$$Full-Page Translations now prioritizes translating only the content near your current view; improving speed and responsiveness. Content outside your view is skipped unless you scroll to it; reducing unnecessary resource usage.$$$$$$Firefox builds in Arabic now come with a built-in Arabic dictionary for the Firefox spellchecker.$$$$$$Address autofill enabled for users in Italy; Poland; and Austria.$$$$$$$$$Fixed$$$Various security fixes.$$$$$$$$$Changed$$$The Pocket toolbar icon; as well as the Pocket integrations on New Tab; have been removed per the service shutdown announcement.
Mozilla Firefox ESR pt-PT x86 Version 128.10.1
128.10.1$$$Firefox ESR$$$May 17; 2025$$$$$$Version 128.10.1; first offered to ESR channel users on May 17; 2025$$$$$$Fixed$$$Security Fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.10.1
128.10.1$$$Firefox ESR$$$May 17; 2025$$$$$$Version 128.10.1; first offered to ESR channel users on May 17; 2025$$$$$$Fixed$$$Security Fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.10.0
128.10.0$$$Firefox ESR$$$April 29; 2025$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.9.0
128.9.0$$$Firefox ESR$$$April 1; 2025$$$$$$Version 128.9.0; first offered to ESR channel users on April 1; 2025$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.8.1
128.8.1$$$Firefox ESR$$$March 27; 2025$$$$$$Version 128.8.1; first offered to ESR channel users on March 27; 2025$$$$$$Fixed$$$Security fix.
Mozilla Firefox ESR pt-PT x86 Version 128.8.0
Version 128.8.0; first offered to ESR channel users on March 4; 2025$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.7.0
128.7.0$$$Firefox ESR$$$February 4; 2025$$$$$$Version 128.7.0; first offered to ESR channel users on February 4; 2025$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.6.0
128.6.0$$$Firefox ESR$$$January 7; 2025$$$$$$Version 128.6.0; first offered to ESR channel users on January 7; 2025$$$$$$Fixed$$$Various security fixes.
Mozilla Firefox ESR pt-PT x86 Version 128.5.2
128.5.2$$$Firefox ESR$$$December 12; 2024$$$$$$Version 128.5.2; first offered to ESR channel users on December 12; 2024$$$$$$Fixed$$$Fixed a crash experienced by Windows users with Qihoo 360 Total Security Antivirus software installed (bug 1934258)
Mozilla Firefox ESR pt-PT x86 Version 128.5.0
128.5.0$$$Firefox ESR$$$November 26; 2024$$$$$$Version 128.5.0; first offered to ESR channel users on November 26; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 128.4.0
128.4.0$$$Firefox ESR$$$October 29; 2024$$$$$$Version 128.4.0; first offered to ESR channel users on October 29; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 128.3.1
128.3.1$$$Firefox ESR$$$October 9; 2024$$$$$$Version 128.3.1; first offered to ESR channel users on October 9; 2024$$$$$$Fixed$$$Security fix.
Mozilla Firefox ESR pt-PT x86 Version 128.3.0
128.3.0$$$Firefox ESR$$$October 1; 2024$$$$$$Version 128.3.0; first offered to ESR channel users on October 1; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 128.3.0
128.3.0$$$Firefox ESR$$$October 1; 2024$$$$$$Version 128.3.0; first offered to ESR channel users on October 1; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.15.0
115.15.0$$$Firefox ESR$$$September 3; 2024$$$$$$Version 115.15.0; first offered to ESR channel users on September 3; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.15.0
115.15.0$$$Firefox ESR$$$September 3; 2024$$$$$$Version 115.15.0; first offered to ESR channel users on September 3; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 128.1.0
128.1.0$$$Firefox ESR$$$August 6; 2024$$$$$$Version 128.1.0; first offered to ESR channel users on August 6; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.12.0
115.12.0$$$Firefox ESR$$$June 11; 2024$$$$$$Version 115.12.0; first offered to ESR channel users on June 11; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.10.0
115.10.0$$$Firefox ESR$$$April 16; 2024$$$$$$Version 115.10.0; first offered to ESR channel users on April 16; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.9.1
115.9.1$$$Firefox ESR$$$March 22; 2024$$$$$$Version 115.9.1; first offered to ESR channel users on March 22; 2024$$$$$$Fixed$$$Security fix.
Mozilla Firefox ESR pt-PT x86 Version 115.9.0
115.9.0$$$Firefox ESR$$$March 19; 2024$$$$$$Version 115.9.0; first offered to ESR channel users on March 19; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.8.0
115.8.0$$$Firefox ESR$$$February 20; 2024$$$$$$Version 115.8.0; first offered to ESR channel users on February 20; 2024$$$$$$Fixed$$$Various security fixes and other quality improvements.
Mozilla Firefox ESR pt-PT x86 Version 115.7.0
115.7.0$$$Firefox ESR$$$January 23; 2024$$$$$$Version 115.7.0; first offered to ESR channel users on January 23; 2024$$$$$$Fixed$$$$$$Various security fixes and other quality improvements.$$$$$$Refer https://www.mozilla.org/en-US/security/advisories/mfsa2024-02/ for security fixes
Mozilla Firefox ESR pt-PT x86 Version 115.6.0
115.6.0$$$Firefox ESR$$$December 19; 2023$$$$$$Version 115.6.0; first offered to ESR channel users on December 19; 2023$$$$$$Fixed$$$Various security fixes and other quality improvements.$$$$$$$$$Developer$$$Developer Information
Mozilla Firefox ESR pt-PT x86 Version 115.5.0
115.5.0$$$Firefox ESR$$$November 21; 2023$$$$$$Version 115.5.0; first offered to ESR channel users on November 21; 2023$$$$$$Fixed$$$Various security fixes and other quality improvements.$$$$$$$$$Developer$$$Developer Information
