Extension support adds useful extra features to the browsers that are unavailable by default. Mainstream browsers like Google Chrome, which dominates the market, do not support extensions on mobile.
A new world of open extensions on Firefox for Android has arrived | Mozilla Add-ons Community Blog https://blog.mozilla.org/addons/2023/12/14/a-new-world-of-open ...
a major update in 2020, and many old add-ons that had not passed the review of addons.mozilla.org (AMO) were no longer available. However, in August 2023, Mozilla announced that ``AMO will begin ...