Three years after its revamp, Firefox's Android browser adds 450 new extensions
techcrunch.com
techcrunch.com
That they took so long to extend the list confounds me.
I'm a heavy Firefox user, but since almost no one uses Firefox for Android, and of that group almost no one uses extensions beyond maybe ublock Origin, I'd put the number of issues at roughly 5.
On a more serious note, I think the Firefox for Android user base is highly educated. They are not going to accidentally install a typical extension to, say, extract website content in markdown, thinking: "What is an extension developer anyway?"
Add-ons -> [add-on-name]: opens the modal content for an addon
Add-ons -> Add-ons manager -> [add-on name] -> Settings: opens the settings page for an addon in a new tab.
Otherwise, I have no idea what you are talking about.