Here is what is new and changed in Firefox 86.0
Mozilla released Firefox 86.0 Stable and Firefox 78.8 ESR to the public on February 23, 2021. The new versions of the browser are already available as direct downloads from the Mozilla website and as in-browser updates.
All development versions of Firefox are updated as well around the same time. Firefox Beta and Firefox Developer are moved to version 87, Firefox Nightly to version 88, and Firefox Android to 86.0 as it follows the stable channel's versioning.
You can check out the Firefox 85.0 release overview in case you want to take a look at it.
- Firefox 86.0 introduces a new privacy feature called Total Cookie Protection.
- Firefox 85 and Firefox 78.7 fix security issues. The highest severity rating is high (second-highest after critical).
Firefox 86.0 download and update
Firefox 86.0 is available by the time this article is published. Firefox users may select Menu > Help > About Firefox to check the installed version and run a manual check for updates. Unless deactivated, updates will be pushed automatically to Firefox installations.
Manual downloads are also available. The following pages list direct downloads for supported Firefox channels.
- Firefox Stable download
- Firefox Beta download
- Nightly download
- Firefox ESR download
- Firefox for Android on Google Play
New features and improvements
Multiple picture-in-picture windows
Firefox users may open multiple picture-in-picture windows in the new release instead of just one. Each stream needs to be opened in its own tab in the browser, and the actual picture-in-picture windows may be moved around to view them all at once.
While it is not a mass-market appeal feature, it is useful for certain scenarios, such as following multiple matches on match day, or watching an event unfold through different camera perspectives.
You can check out our full review of Firefox's multi picture-in-picture feature here.
Total Cookie Protection
Total Cookie Protection is a new privacy feature designed to separate cookie data by website. Each site gets its own cookie storage and that means that access is restricted and not shared across all Internet sites.
Mozilla notes that it decided to make exceptions for non-tracking cookies that are cross-site that are needed, e.g. for sign-in purposes on sites. The organization notes:
Only when Total Cookie Protection detects that you intend to use a provider, will it give that provider permission to use a cross-site cookie specifically for the site youâ€™re currently visiting
The new feature is enabled automatically when you enable the strict mode of Firefox's Enhanced Tracking Protection feature. Firefox users who want to try the new option may point their browser to about:preferences#privacy to set the Enhanced Tracking Protection preference to Strict on the page.
- Print functionality offers better integration with the operating system's printer settings and a "cleaner design.
- Canadian Firefox users may now use credit card management and auto-fill automatically, as it is enabled by default. Users who don't want that can turn it off under Menu > Options > Privacy & Security > Autofill credit cards.
- Performance and stability improvements by using the GPU process for canvas drawing and WebGL drawing.
- Reader Mode works on local HTML pages.
- Various Screen Reader improvements and improved link color contrast in Reader View.
- Improved security by consolidating all video decoding in the new RDD process.
- Linux and Android users are protected against stack clash attacks thanks to implemented mitigations.
Firefox for Android
Firefox 86.0 for Android's release notes are now available. The browser supports Total Cookie Protection in strict mode just like the desktop version of the browser.
Other than that, it does include security fixes and a mitigation against the stack clash attack on Android.
- DTLS 1.0 is no longer supported for for establishing WebRTC's PeerConnections. The new minimum version is DTLS 1.2.
- Improvements to the Tabs permission for extension developers (tab URL, title and favicon no longer require the tabs permission for host permissions for tabs.
- New experimental base content security policy landed behind a flag that disallows remove code execution in extensions.
- extensions.webextensions.tabhide.enabled has been removed because the tabs hiding API is enabled by default.
- Windows.name is reset to an empty string if a tab loads a page from a different domain to prevent the new tab from accessing information that previous tabs might have stored.
- Basic AVIF support is enabled. Some features, animated images and colorspace support, are still in development. (appears to have been postponed)
- Developer Tools Toolbox shows the number of errors on a page.
- The release notes list no known issues.
Security updates / fixes
Security updates are revealed after the official release of the web browser. You find the informationÂ published hereÂ after release.
Firefox 87.0 will be released on March 23, 2021 according to the Firefox release schedule.
Recently Reviewed Firefox extensions
- Manage browser tabs efficiently with open source TabMerger extension
- Manage windows, and move tabs between them quickly with the Winger extension for Firefox
- Read pages in a distraction-free mode, print or save them with the Reader View extension for Firefox and Chrome
- Write notes in a new tab and save them locally with the TextNotes extension for Firefox
Recent Firefox news and tips
- Another glimpse at Firefox's upcoming Proton design refresh: the new menu
- Firefox 89's user interface will be leaner and less convoluted
- Firefox Top Sites to be renamed to Shortcuts. New Design launches in Nightly
- Mozilla Firefox gets open to display modified preferences only on about:config
- Mozilla retires Firefox Voice and Voice Fill extensions
Additional information / sources