Must Have Browser Extensions

[SHiFT.]

Hello HWC,

So i was commenting on lowfat's great pictures in his recent build thread and i wanted to know what the settings were for the shot. He pointed out that i should get a EXIF viewer extension for chrome. This got me thinking, what other extensions am i missing out on?

So what are your must have extensions. Please specify what browser you are using this extension on and if it exist on others.

Thanks
SHiFT.

[Apathetik]

Adblock plus, turn off the lights (for streams/youtube videos)

Google Chrome and Firefox

[3.0charlie]

For Exifs, I use Opanda.