Opera used to be a fantastic web browser, with a custom high-performance Presto rendering engine and features like tabbed windows that didn't show up in competing browsers until years later. However, the modern Opera browser is a shadow of its former self, reliant on chasing trends and meme advertising to
Considering that the chrome app does not even have a way to install extensions, this is still a massive win for Firefox.
Mozilla has also started to make more and more extensions compatible with the mobile app recently, see https://blog.mozilla.org/addons/2023/11/01/is-your-extension-ready-for-firefox-for-android/
It does keep getting better and better (while Chrome gets shittier and shittier).
In the olden days they had 100% support for extentions