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.
Try running an incognito window only, which should run without extensions (unless you manually enable each for private browsing). Check your usage then to see if the extensions are actually the problem.
Honestly 1.7gb of RAM for a modern browser is not that unexpected. Outlook is not a low-cost web service, first of all, but also the first tab is by far the most costly -- most of the RAM is for the browser itself. Even with ten or twenty tabs I wouldn't expect your RAM usage to balloon much, and if they're "background" tabs, i.e. tabs you've kept open from previous sessions but haven't actually looked at yet, they basically take no resources -- actually one of the areas that Firefox does a lot better than Chrome.