[InGodsName]

Sorry, if it's a stupid question.

Is that what git blame does

[SubMachineGhost]

git blame shows the last person who modified a line, and this information is retrieved from the commit history.

This extension how ever shows you which pending pull requests are changing a given file.

[dzhavat]

Exactly. GitHub is quite good at showing the history and current state of a file. This extension aims to also provide a way to see how a file might change in the future.