Since the last update (55.0.3 - 32 bit), pages that use Adobe Flash (like Facebook games) have become terribly slow. When I move the cursor and click on interactive items on the Flash animation, the page hangs or freezes for a few seconds. The browser gets slowed down to the point that I have to wait several seconds to even close a tab, and it makes the fan of my computer run faster than usual. I know some people experienced this problem after the last update and chose to install an older version of Firefox, but that's not safe. Do I have to say goodbye to Firefox after all these years? Sad.