Firefox-mienskipsfoarum

Since updating to the above OS on my Macbook Pro I have not been able to use any screen share functions (e.g. Adobe, MS PowerPoint etc) while using Firefox - all of which worked fine before. I've tried all kinds of suggestions including from this forum but nothing has worked. The site I use most is Konfidens. The only option that comes up when clicking on Share Screen is Use Operating System Settings (see attached screenshot). When you click on it the only option is "share entire screen" which isn't what I need or want. The Konfidens tech support team is looking into this but given the screen share option works fine on Chrome, the problem is evidently with Firefox. I want to stick to Firefox for security reasons but if I cannot resolve this, I will have no option but to move across to another browser. Many thanks in anticipation!

I have multiple profiles, one of which I use the most and consider the main profile.

I just used another profile, then switched back to the main one, after which I selected a desktop shortcut, which opened my secondary profile, instead of opening up in the main one.

How can I avoid this?

EDIT: Along with my original inquiry, i just noticed a couple things in the interface changed. I discovered that I had been upgraded from v133 to v134 without a confirmation notification, and also contrary to my settings, or so I thought.

This is my normal setting (first Image), but then I checked my settings, which were changed without my knowledge.

I never allow automatic updates.

I have firefox installed using google search. After the latest update searching is extremely slow. This is a windows 11 machine. I have cleared cache, cleared browsing history, turned off add blocked and some extensions and add ons. Response time on opening search results is extremely slow. Other search engines respond immediately.