I reinstalled Firefox and no change. The menu button doesn't work sometimes either. I unfortunately have to use another browser in order to post this.

Here is what the preferences page looks like now. As you can also see, in the top right corner next to the last tab, there is no longer the drop menu icon so I can search through my tabs. The ability to use my mouse's scroll wheel to scrub through tabs is no longer an option/capability.

SOLVED: I used up all the troubleshooting at my disposal and I VERY VERY VERY hesitantly refreshed Firefox. That resulted in all problems being fixed. Back to business as of now.

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.

How do I do that?

It was done. Have a good day.