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Instead of installing updates to the browser automatically, Firefox will now display a prompt to you that puts you in control of the update process.
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I decided to use Firefox Aurora in the meantime, but the second option would have worked as well.
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It did not, which left me with two options: use a different channel of Firefox in the meantime or go back to the Nightly version that worked just fine. I was not too worried about that at the time as I knew that Nightly versions of the browser sometimes had hiccups like this, and that the next update would likely fix the issue again. I got weird black bars on the screen that would move around on mouse movement and made it impossible to work with the browser at all. My Firefox Nightly version that I have been running for some time now received an update two days ago that rendered it completely unusable.
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