Replaces occurrences of 'MyCourses' with 'MyCurses'.
Get it from addons.mozilla.com
- Download the xpi file
- In Mozilla, choose Add-ons from the Tools menu and select the Extensions tab.
- Drag-and-drop the xpi file onto the page.
Mostly stolen from https://github.com/DaveRandom/cloud-to-butt-mozilla