After detecting that the Windows system is running in a low remaining memory state, the latest Firefox 93 will unload the tabs (Unloading Tabs). Mozilla believes that this feature can reduce Firefox’s memory footprint and crashes due to insufficient memory. The user needs to click on the unloaded tab to reload it.
In fact, similar functions have been launched in Edge and Chrome browsers. The Edge browser is called Sleeping Tabs, and Chrome is called Discarding Tabs. The purpose is to improve memory, CPU, battery life and performance.
Inspired by Chrome, Mozilla deployed the uninstall tag feature in Firefox 67, which was released two years ago, but the Firefox team was unable to figure out the low memory status on the user’s machine, so the feature was disabled.
In the latest version of Firefox 93 Nightly, Mozilla reintroduced this feature and will land on Linux and Mac platforms in the future. The company is planning to create a page for the uninstall tab of the Firefox browser, similar to chrome://discards.
Even if you have a high-end system with higher memory installed, your system may consume more resources when running multiple applications. In this case, the Firefox browser will unload the tags and release resources, thereby reducing memory and improving the system’s response speed and stability.