Hi there, I have been using Firefox since a long time with these extensions. Do you think if any of those are redundant? Why I ask this is that while using Outlook in Firefox, it's consuming around 1.7 GB of RAM. I don't think it should be using this much amount of RAM for just a single tab of Outlook. Edit: I already use uBlock Origin, but it's not present in the attached pic.
What part is confusing, exactly?
what is a "browser app store"? do you mean the addons/extensions page?
what extension have you downloaded that made you think the browser's owner can edit the extensions? are you just making stuff up?
i've always used uBlock Origin in firefox and it never showed any ads except for youtube a couple of times because of anti-adblock updates from youtube, that were quickly patched by ublock!