I had Firefox 62.0.2 running on my Mac, with extensions like Ad Blocker and Translations, but as it was real real slow, I had asked to run without extensions, and the next time it responded with the "Your Firefox profile cannot be loaded. It may be missing or inaccessible." so I had followed all the advice published on the www, but after 2 days, found none of the answers and suggestions is working or is applicable, so I had implemented few removals and new installations of the application - but, always getting the same famos ”Your Firefox profile cannot be loaded. It may be missing or inaccessible." and A Freeze during the "verification of firefox.app" each time, on completely new installation! In fact, the Firefox/extensions folders were never created on my Mac (On new install, as well) but the application was working for a long time, and there was/is a Mozilla folder which seems to hold my Chrome (add-ons) but no Firefox folder exists on this and my other Mac in the Library/Application Support. I even removed my Chrome and reinstalled it to see if it can be done, and there was no problem in new Chrome installation - as it is with Firefox 62.0.2