It should fake JavaScript API and provide fake info to trackers. There no many users and Mozilla is not tracking it for security.
- It’s quite good. I’d rate it the second most essential browser extension, after uBlock Origin. 
- I use it, it works. https://coveryourtracks.eff.org/ - Waiting for it to be available mobile too. - check this: InviZible Pro: increase your security, protect you, thoughts (android) - (not JS, but should help with mobile) - Invizible pro is very good, but it does not do what this does. - I used invizible before I switched to RethinkDNS 
 
- I just tried it in Smart Cookie Web Preview and it works. Note that scwp is out of date though. It lets you add any extension without creating a custom collection with Mozilla. 
 
- See if creepjs can identify it. - deleted by creator - It’s pretty much the only thing that Creep.js doesn’t see right through. At least in my checks on Android - I don’t remember which site can but check under Arkenfox wiki for fingerprinting test sites. Iirc I saw a test that could fingerprint jshelter but I could be wrong. 
- Interesting, ill def look into that. Do you use base Firefox or something hardened like Mull (on fdroid) - Usually Mull, but also have Fennec, Mulch, Cromite etc. Installed 
 
 
 
 
- Just tested it out. I thought it was like NoScript in the sense that it would break all websites, but it doesn’t. That’s a better extension than I thought 

