Version 93 of Mozilla's Firefox browser – Firefox 93 – has been released, and one of its main features is tab unloading.
See also: Firefox overrides Windows 11 default browser settings
The feature – currently only available on Windows, with macOS and Linux to follow – is triggered when the browser thinks a memory outage is imminent and will unload the least recently used tabs first.
A month of testing in the Firefox Nightly channel found a decrease in browser and content processing errors, but also an increase in out-of-memory errors, as well as an increase in average memory usage.
In the next version of Firefox, an about:unloads page will be added to provide diagnostics when unloading tabs.
See also: Chrome, Firefox, Safari, Edge & Brave: What settings to change to enhance privacy?
Firefox 93 also introduces the feature of blocking HTTP downloads from HTTPS pages, followed by the display of a dialog to users warning that it is a potential security risk and asking if they wish to continue, as well as blocking downloads from tested iframes.
The browser has also ended default support for 3DES encryption, but it will still be available when websites use outdated versions of TLS.
Firefox 93 also packs the third version of SmartBlock technology, which can replace Google Analytics, Optimizely, Criteo, Amazon TAM, and various Google advertising javascripts with localized versions that behave like the originals to prevent website crashes.
See also: How to copy the URLs of all open tabs in Firefox
The browser changes its referral policy to ensure that websites cannot override the default trimming that Firefox applies to URLs between websites.
Information source: zdnet.com
