Delete All Facebook Messages At Once

I've been searching and searching for an extension like this for years. I've found some sketchy bugged ones that didn't work as intended.
Then I found some that worked, but suddenly stopped working (Guess because of Facebook-reprogramming).

I guess there's a lot of people out there like me, wanting to delete all traces of themselves on the internet, and god damnit Facebook for not making a "Delete all" button.

But here it is. I found it!
https://goo.gl/t3vBiA

Press clean logo in your Chrome toolbar, press select and select all, and then delete.
As simple as it can be!

I've had so many people asking me for a function like this.
Let me point out, that I have nothing to do with this company, I only want to be kind.

I would really appreciate an upvote if you find this useful.