Features i estimate as essential for this app :
| Browser \ Func | Replace default keyboard shortcuts | Unload events | ||
| Used for | Ctrl+D for draw, Ctrl+U for untap, etc. | Detecting a user quit | ||
| Firefox | yes | yes | ||
|---|---|---|---|---|
| Opera | no | no | ||
| Chromium | mostly (only ctrl+n isn't cancelable) | yes | ||
| IE | Realy ? | |||