I-Firefox ye-Android Isithangami Sokwesekwa

On any site I have tried (including this one right now) the Enter button of my digital keyboard does nothing. I am on a Kindle Fire HD 8 (7th generation). The Enter button works just fine in other apps, and worked in the browser apps I used before Firefox. I just checked and it's still working in the native Silk browser.

I want to open multiple pages at the same time in Android 12, but Firefox for Android does not seem to support multi-instance (like in the attached image). I also tried beta and nightly but none of them worked either. As other browser apps (Chrome, Edge, Samsung, etc.) support it, I switched my default browser app to Samsung internet on Android (temporarily).

I don't want to use multiple apps (Stable, beta and nightly) just for opening multiple pages in a single screen. Is there any plan to support multi-instance in the future version of Firefox?

When I select a text from any website there is no option to search privately (unless you're already in private mode). Having Firefox Focus installed makes the option appear but it opens the link there aka in a different app, it would be a lot better if you need have to install another app and yes I know i can just do it manually by copying the text, switch to private mode, pasting and then finally searching. It would save you 3 taps. (The images are with the Firefox Focus app uninstalled, I can provide more with it being installed and how it works.)

I'm a physical keyboard user for Android and find it impossible to use Firefox, there doesn't seem to be any documentation on simple keyboard shortcuts for access the addressbar or menubar, getting to search in the page, or access fine-grained tools for navigation like there is on the desktop version.

Where are these features documented? The Android Talkback feature doesn't cut it for me.