Fixed it!
Wow, this new windows is solid.
I used the task manager activate my firefox and look online and find solutions. Nothing presented itself right away.
Then I thought a bit, and common sense told me that if something wasen't working, it's probably because of the webcam I just installed. Therefore, I shut down all the processes that were labelled : camera, webcam or logitech.
Then I used the task manager's run option to relaunch >explorer.exe
That worked. I uninstalled and re-installed.
To re-install my webcam, I simply used the plug and play feature instead of using the CD that came with it. I was able to find all the drivers online and it works fine now.