Adds commentary, keyboard navigation and useful info to the pages of Homestuck.com stories.
Homestuck Companion currently displays partial commentary for Homestuck (up to and including the first third of ACT 5 ACT 2), complete commentary for Problem Sleuth and enables keyboard navigation for all adventures on the site and Homestuck^2's.
To use: just go to a supported URL like "https://www.homestuck.com/problem-sleuth/10" or "https://www.homestuck.com/story/513" and behold the commentary. Use the extension options in order to disable commentary display, if you just want the controls.
Keyboard controls (arrow keys for changing pages, right ctrl key for opening/closing pesterlogs) work on every page of every adventure except Bard Quest.