With Firefox’s new release schedule, you may be seeing update messages every few weeks about a new beta version.
If you’re tired of seeing these, you can easily disable them.
First, in Firefox’s URL bar type about:config. If you get a safety warning, hit I’ll be Careful.
Next, in the filter bar type app.update.channel.
In the value column, change beta to release.
Now you’ll only be notified when there is a stable release of Firefox available.
If you want betas, and don’t currently get them, then change release to beta. Or you can change it to nightly for every minor update that Firefox makes. I’d consider these alpha builds.