Today I learned the importance of Firefox profiles.

I’ve always found it annoying when you run Firefox and you can open as many windows as you want until one or two random occasions when Firefox tells you to stuff it because you’re already using that profile. Today, I could not figure out why or how Firefox was already using my profile so I messed around with the profiles and nuked it.

Now it was not until I created another profile and used it before I realized what I’d done. I had effectively nuked all of my saved passwords, preferences, cookies, extensions, themes, and bookmarks. And it took me the past half hour to reset most of my settings.

So listen: never nuke your default Firefox profile.