Greasy Fork is available in English.
Collects panda's for you at a certain cycle instead of timers. Lot of organizing of panda's and grouping them together to start and stop them at once.
It should work with firefox newest version but you have to use tampermonkey. Greasemonkey was changed too much for it to work properly. I don't have Linux to test it in so I am not sure if it will work perfectly.
What version of firefox is requred?
Every time i go to the url https://worker.mturk.com/requesters/PandaCrazy/projects, i see "Sorry, we couldn’t find that page
Strange... the page you were looking for is not here. Let’s go home and try again." So something is happening that is not triggering Panda Crazy to load. I'm running firefox 57.0.4 on Linux Mint.