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Little agoo The new version of the Mozilla Firefox 67 web browser was released which adds new features and especially bug fixes around the previous version. In the same way, it is also important to mention that with the release of this new version of Firefox 67 for desktop, the mobile version of Firefox 67 was also released.
Of the main novelties that stand out in this new release is memory management, improving the performance of the browser in the system.
Main new features of Firefox 67
In this new release of Firefox 67, as mentioned, memory management was improved, where sand implemented the ability to automatically download tabs to free up resources.
The feature kicks in when there is a shortage of memory (less than 400MB free memory) and first of all, it replaces tabs that have not been used for a long time.
In this case, the tabs do not disappear, but are transferred to the state of readiness for loading (standby mode), similar to what is observed after restoring the session. To control the operation of the mode in about:config the option is added "Browser.tabs.unloadOnLowMemory".
The optimization is implemented by reducing the priority of the event handlers of the setTimeout timers during the page load (by analogy with the background tabs, the time budget provided is reduced, which is spent in the execution of the event handler timer).
Background handler limitation allows you to allocate more resources to handlers which affect the initial rendering of the page.
For example, the main scripts of Instagram, Amazon and Google due to the additional optimization run 40-80% faster.
On the other hand the number of API calls that are available only when opening a page in a secure context, that is, when opening over HTTPS, through localhost, or from a local file.
In Firefox 67 for the pages that are open out of protected context, denied completion toast notifications via the notifications API, displayed outside of the browser window.
Also private viewing mode was improved and the ability to to save passwords in forms on sites open in private mode.
Controls have been implemented to activate plugins in private mode: in the plugin manager, the user can now determine which plugins to include in private mode and which to use only in the main session.
For new add-ons, activation in private mode is prohibited by default (to change the configuration, it is necessary to activate).
WebRender
This new version of Firefox 67 includes a Servo WebRender composition system, written in the Rust language and which takes to the GPU side the operation of rendering the page content.
When WebRender is usedInstead of the composition system built into the Gecko engine that processes the data using the CPU, the shaders run on the GPU to perform summary rendering of the elements on the page, allowing for a significant increase in rendering speed. drawing and reduce the load on the CPU.
By default, WebRender is still enabled for about 4% of Windows 10 users using NVIDIA video cards. Inclusion for other users will depend on the test results.
If all goes well, on May 27 the coverage of the tests will be expanded to 25%, from May 30 to 50% and during the first week of June to 100%.
You can verify the activation of WebRender on the page about:support. To force include in about:config, you must activate the settings "Gfx.webrender.all" and "gfx.webrender.enabled" or by running Firefox with the MOZ_WEBRENDER environment variable.
On Linux, WebRender support is roughly stabilized for Intel graphics cards with Mesa 18.2+ controllers.
Finally the updates to this new version will begin to be deployed from now on and if you want to use the browser you can download it from its official website.