This breaks right-click functionality in "io" games, like Starblast.io. Right-clicking causes the Firefox menu to show up while the game is supposed to be using it for movement.

Does it allow to upload own images that are not on a page? If not 1 star...

Does the job, but missing some features.

When you right-click an image and choose "Upload to Imgur", when the upload is complete the image opens in a new tab which is given focus. It would be nice if there were a few options: -

1. Have the URL of the image automatically copied to the clipboad.
2. Have the image open in a background tab instead of it taking focus.
3. Not have the image open in a new tab at all, if the "copy to clipboard" feature is enabled.
4. The ability to upload to an Imgur account.