Forum zgromaźeństwa Firefox

I just updated my iMac from Mojave to Catalina 10.15.7. I thought Firefox would provide an update to convert the esr version to the standard Firefox browser since I am no longer using Mojave, but the next update is 115.15.0esr. Is that correct? My understanding is that the esr updates are just for computers using older operating systems through Mojave. I did not update to 115.15.0esr since I am not sure if that is the right version for Catalina. Any information and assistance you can provide me is greatly appreciated. Thank you.

I've noticed that after a few months Firefox ESR will go from being one specific version to two different version tracks. Eventually the older track is removed and the newer one is continued until it then splits. Can someone tell me why this happens and is there an easy way to swap over to the current track? I've included an attachment of what i'm talking about.

For a few days now whenever a new tab opens, either by clicking a link in search results or by clicking a link in an email, the cursor jumps to the bottom of the page and I have to scroll to the top of the page. I'm just getting started with Windows 11 on a new computer. What happened to cause this?