Cool and funny.
but, can you make it able to see what was changed to boss? like make the text a different color or something?

A great add-on to people that go in various social media websites everyday (principally Twitter, and sometimes Reddit). Good for people who are sensible to cuss words, or simply don't like'em. There are some people that just don't want this type of bad, toxic words in their brain's subcounscious, y'know? I would like to contribute to this add-on, maybe help to create a bad-word filter, idk. It would be great.

I think it's great but I'd love to see version with dropdown menu to add words to filter.

J'ai réussi à supprimer les insultes sexistes et masculiniste de mon vocabulaire grâce à cette application

An und für sich eine gute Sache!
Aber in bestimmten Situationen stört es die Lesbarkeit bestimmter Texte...
Beispielsweise in Wikipedia- oder Zeitungsartikeln, in denen der Begriff "Hexe" verwendet wird. Nicht als Beleidung oder Diffamierung sondern z.B. historisch (z.B. bei Hexenverbrennung) oder tatsächlich gerechtfertigt (z.B. bei Ilse Koch...). Also wenn sich das Tool z.B. bei Wikipedia ausschalten ließe, wäre meinem Leseempfinden ein Diest getan.

I will never understand how people are against an additional option. Mozilla does not censor the internet with that extension. It is just an option to make your surfing experience more healthy and less anti feminist. I really feel like some patriarchists feel attacked with that extension and does not want a change to happen in the world.
When you want your absolute "freedom" just dont install it.
For me personally it is a great step towards a better internet and the right step into a world where you can't hate people just because you are anonymus. Thats not freedom thats the art of beeing an asshole and leads to many serious problems like depressions, hate, polarisation and bubbles. Lets make the internet more personal and the people more responsible for what they are doing.
Thanks firefox you made a great step with that add on.

Why tf is Mozilla receiving so much hate for this?

It didn't quite have the effect I thought it would, but I sometimes get a chuckle out of seeing people call each other "boss".