# The extensions listed here are no longer supported, these pages are just maintained for historical reasons!
This extension adds a few extras useful to those that regularly test nightly builds of Firefox, Thunderbird, Sunbird and Toolkit Seamonkey (Suiterunner).
Don’t forget that forcing an incompatible extension to install is risky. There are many cases where Firefox will stop working completely or behave incorrectly because an incompatible extension is being forced to work where the author never intended.
The following is a brief list of the extension’s features, for the full set of features please take a look at the features list.
- Extension compatibility fixing
- Titlebar customisation
- Build ID retrieval
- Screenshots
- Breakpad information
- Restoring tabs from previous session
- Leak log analysis