Inline-renaming of a library file/folder doesn't reflect in the Editor UI until you force a browser refresh. STR: 1. Log in, create a new Library 2. Add "blah" 3. Rename "blah" to "blargh" 4. Look at the "blah" tab Expected Results: It should now read "blargh"
The builder project has been discontinued as of April 1st, 2014. The announcement last year: https://blog.mozilla.org/addons/2013/12/18/add-on-builder/ Next steps (still being written): https://developer.mozilla.org/en-US/Add-ons/SDK/Builder