Firefox users criticized the permanent ‘List All Tabs’ button introduced in version 131.0, leading Mozilla to make it removable.
The button, designed to manage hidden tabs and prevent add-ons from hiding them, received backlash for being unnecessary alongside Firefox View.
Mozilla responded with a fix in version 131.0.3, allowing users to remove the button through toolbar customization.
tab management addons is one example, like those that make tab groups. maybe there are other use cases too, but this feature is for the addons, not to be directly used by users