this extension produced a lot of traffic to shopping sites, witch costs many mobile data for non flatrate users money

Contains advertising click fraud by using users browser as reverse proxy in p2p paid network

it works great many times, but not very rarely it will simply NOT send any header added.
I would like to report this as a bug: it sometimes repeatedly will not send any header, even after restart of firefox.
In Chrome i did not have such problems.

Very useful for web development.

What the heck happened to the UI?! I mean the weird blue wasn't pretty, but what in the heck is this mess of junk?! Random 1's all up on the side? Why not count? Or take the first letter like sane circle icons everywhere else. And the colour contrast makes them almost all look like the same same colour, wat?

I miss the old UI, and that wasn't pretty either!

Works great on Chrome, on Firefox however it will not modify the header of a POST request made from a SWF file.
It modifies the referer for "Request Headers", but not "Request headers from upload stream".
(yeah they are 2 different things with unique headers from a single request)

Works as advertised, useful for debugging

Back on line since the version 2.3.2, good product and nice for sharing profiles between firefox and Chrome

Good tool,thanks.

Дозволяє додавати власні хедери, створювати профілі, фільтри, робити бекапи профілів в клауді.

Doesn't do anything:
- the headers I set do not appear in outgoing HTTP requests
- they are not even remembered

using FF 66.0.3

Really good:
i tried a lot of different 'overrated' extensions: no one BUT THIS SIMPLE ONE was able to 'Accept-Language' with the proper Locale