Hi, Having this issue for weeks now, I finally decided to create a ticket. I currently use Firefox Developer Edition, but it has some problem: At random times, a background process starts and begins to use an absurd amount of CPU. I have a really good CPU and this issue still occurs when I start my laptop without even unlocking it yet. I'm thinking it has something to do with an update service, but I already tried disabling automatic updates and updated to the last version. I even deleted all add-ons, but it didn't help at all. There is a strange folder in the installation folder named "tobedeleted", which gets automatically created. I don't think it is some virus because viruses would've aimed for Firefox and not the Developer Edition, which is a completely separate install. I didn't have this problem about 2 versions of Developer Edition earlier so I don't think it's my system config or antivirus/firewall. The issue is very strange and annoying, I've tried reinstalling, deleting and removing leftover folders on the whole disk but the issue still persists. I even did a Firefox Refresh multiple times, but nothing seems to work. I would be very thankful if this problem gets solved and I'd love to help you guys analyze the situation because I really like the Developer Edition. I have a lot of experience with programming and computers in general so I could do some debugging. Thanks in advance! Greetings, Rein (rdeboer2004@gmail.com)