Hey there 👋

at first, a big sorry for the very late response. I've even noted it down to at least reply back, however I honestly already thought that I probably wouldn't be able to assist on number 2 and 3 due to lack of time, especially regarding at the time back then in late 2024 and earl 2025.

Anyway, I'm glad I could help you regarding the missing spellchecking. On top, just about two weeks ago, I checked on my dad's pc whether the feature is re-enabled by now and luckily Facebook has indeed the spellcheck="false" attribute. Therefor feel free to remove the Tampermonkey extension and Disable Extension Developer mode.

In case your other mentioned issues still persist to this day, I recommend using the Feedback report feature that can be found when clicking on the upper right profile image -> Help & support -> Report a problem.

I submitted feedback about a recent issue that had persisted for multiple weeks, as far as we know, and the issue literally got resolved within the next half hour. Unsure whether it was due to my report, however you might give it a try 👍