I use the free version of Bitdefender and disabling it allows BetterTTV to load. So for me it is definitely my anti-virus. Unfortunately, the free version of Bitdefender does not allow you to add exclusions 
My mistake, disabled BitDefender’s virus shield and BTTV loaded right up. Definitely seems to be the issue
I disabled my anti virus and nothing happened
Seems to be working again, BitDefender enabled and all. Perhaps just a minor glitch of some kind?
[edit]
Strange, stopped working again.
It wasn’t working for me earlier. I disabled Bitdefender and refreshed and BTTV worked. I enabled Bitdefender again and it’s still working 
Tried everything on there and then reset firefox just to double check if that might work. Still not working at all. How do I check the Javascript console???
@night Tried everything on the BTTV debugging page and then reset firefox just to double check if
that might work. Still not working at all. How do I check the
Javascript console???
BTTV isn’t working for me either. I’m using the latest version of firefox (37.0.1). So far I have:
- Cleared all cookies & cache
- Disabled all other firefox add-ons
- Temporarily disabled windows firewall; I don’t use any others
- Reinstalled BTTV
- Browsed through the Javascript console, but I don’t know what I’m looking for.
I found an “Object” in the Logging category of the console that references my BTTV installation location, but I can’t make any sense of it. Note that it only appears in the console on the first load of Twitch after clearing my cache. http://i.imgur.com/10KtBUE.png If there’s anything else in the console that’s important, let me know and I can take another screenshot.
The only other solution that I know of would be to reinstall Firefox, but I would like to avoid that if possible.
I cannot see any reason why Firefox would be having issues with the add-on itself suddenly. It is possible your Firefox profile became corrupted. I suggest resetting Firefox to see if that helps.
I reset Firefox, and installed BTTV without changing any settings or installing any other extensions; still not working. The add-ons page in Firefox shows it installed correctly, but there’s no sign of it on Twitch.
Is the XPI file in Firefox\Profiles\my profile.default\extensions supposed to be 24KB? It seems small compared to other add-ons but what do I know.
BTTV had been working for months before it stopped a few weeks ago when the BunnyEars came out. I can’t recall doing anything that could have broken it at the time, though.
I’ve already stated that I’ve tried resetting firefox twice. I’ve done quite literally everything that has been suggested in this thread and every other thread I could find. It’s simply not working.
I’m in a similar situation as Thorg. It was working for months, then one day it suddenly decided “Nah, I don’t feel like it.”
It’s possible this is an issue with the latest version of Firefox, does downgrading to Firefox 36 fix the problem?
Updating to the new version 37.0.2 didn’t change anything, I’ll try downgrading when I get the chance.
I downgraded to 36 and 35. no changes. upgraded to 37.2 no changes
Well unfortunately since I cannot replicate the problem, it must be local.
Try to delete your Firefox profile:
C:\Users\YOURNAME\AppData\Roaming\Mozilla\Firefox\Profiles\
Edit: Apparently Adblock might be breaking BetterTTV. So try disabling that too.
Hello, I was having the same problem with FireFox. What I noticed was Ad-Block Plus had began to bug other sites that I used and I disabled it. However, that didn’t work. I did all the steps that you listed except messing with the XPI file. I then went to Twitter and asked people what ad-blocker they use/prefer and I came across uBlock. I then installed it, and I think (it turns on by default), I then disabled Ad-Block Plus and BTTV all of a sudden worked. I don’t know if it’s with the newest update from FireFox or what, but I am on the latest version of FireFox and BTTV is still working.
won’t deleting my profile get rid of all my bookmarks and everything else?
The idea is that for some reason your profile is now corrupted. You can always move it elsewhere and restore it if the issue isn’t fixed.