Is there an option to compare files between branches like in IntelliJ IDE?

Hi Elnatan! In 1.27 version there will be an Compare with Clipboard action action to compare two contents: e.g. a file with clipboard, and Open Diff action to compare two arbitrary text contents:

What about comparing code between branches? @andrey.dernov

We are working on it. Please feel free to track and vote for FL-15169 Thanks!