Why have my addons suddenly disappeared

So for some strange reason my addons are gone. One day they were there and the next day they were gone. I have no idea what's going on. I've tried to search through many different folders and there's still no sign of any of my addons. So where are they all? Why would they all of a sudden disappear?

Hi brandon236,
did you check
C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\<yourprofile>\extensions?
Your add-ons should be there? If not check the firefox profiles folder
C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles?
Look for other profiles and search in there the extensions folder. May be for some reason you changed your profile?
That's all i can respond to you. Good luck!

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