Resize the window to the most ideal size
Do you often find yourself in the situation that you are resizing windows to make sure you can fit multiple windows next to each other on the screen? This add-on resizes the browser window to the most ideal size for the site you are on. It currently supports:
Google Docs
bugzilla.mozilla.org
github.com
developer.mozilla.org
If you would like to add more sites, I am looking forward to your pull request at https://github.com/kewisch/ideal-size. You can also get in touch using a github issue or the support email. Be sure to include details about what you believe is the ideal size.