I've always used firefox to watch my favourite series of anime but recently due to the new version Firefox released I cannot watch anymore. The site where i watch requires user agent switcher which i can easily find before in the add-ons settings. Now that the firefox has upgraded, a lot of extensions can't be used and it always says that "it's not available" to the current firefox. All i wanted was a user agent switcher, update the stuffs and watch again. Please fix this Firefox.