I have lenovo k3 note n I use Firefox addons to download bt since last few days its nt working...or it doesn't even show up in d addons the way it used to be....I need serious assistance regarding the same coz I want to download videos from YouTube only....in HD n nw after trying various extensions available on the store the size of video which appears is 0.21 max n that's some wrong info or bug or error idk....plz help me what should I do.... Spartans