This topic is for Firefox, and Firefox based browser users.
If you don't have it, consider getting it. It is free, and open source. It is also faster, and more secure than Chrome.
It can run on Windows, Mac, Linux, Android, and yes, even G00gle Chromebook$!
And, it has much more dev tools than Chrome ever will.
get it here

This is a duplicate that was (ironically) started for the same reason