Do you want to stay on the beta update channel or can you switch to the release channel as recommended for for normal users?

You can only switch the update channel by installing a full version because an update doesn't touch the channel-prefs.js file and you can't change the updated either via a prefs on the about:config page.

You can find the full version of the current Firefox release (50.1.0) in all languages and all operating systems here:

• https://www.mozilla.org/en-US/firefox/all/
• https://www.mozilla.org/en-US/firefox/notes/

Beta version is here:

• https://www.mozilla.org/en-US/firefox/beta/all/
• https://www.mozilla.org/en-US/firefox/beta/

• https://www.mozilla.org/en-US/firefox/51.0beta/releasenotes/
• https://www.mozilla.org/en-US/firefox/51.0beta/system-requirements/

Ok am reinstalling now beta now... :P

Do you have a specific reason to use a Firefox beta version?

Yes, less tab spinners and YouTube auto-pause when opening YouTube in new tab :) Got it on Beta now by reinstalling, thx! :)

Keep in mind that beta updates twice a week normally and may not upgrade automatically to the next major version.

That is weird. Why would it not auto-update to next version?