the original extension is addons.mozilla.org/en-US/firefox/addon/pesticide/ as stated in the original repo github.com/mrmrs/pesticide and it DOES NOT REQUIRE ANY PERMISSION

Bardzo przydatne dla frontendu!

why does it need special permission like collect all data and stuff for just adding elements?

I liked the Chrome version of this addon as it didn't require any special permissions. I'd love to know why it needs the specific permissions it requires when all it's doing is adding a border: 1px solid to all the DOM elements on the page

Awesome add-on, Now i don't have to apply border every time.

I use pesticide for Chrome at work and was worried I wouldn't be able to find one for home (Corporate firewall/IT policy doesn't allow Firefox at work, but it's all I use at home). This works perfectly! Thanks @Daniel Oshiro!!