Note for Firefox 70.0.1 users

Firefox rolled out a point release, 70.0.1, that fixes a major problem (browser crashing when the Site Bleacher add-on is installed in my case, or perhaps any storage cleaner that cleans indexed db storage).

For those that toggled to false in order to work around the problem, you can go ahead reset that pref in about:config and remove if from your user.js/user-overrides.js if you added it there.