For those having Problems! Rated 5 out of 5 stars

1.Restart as directed after install,then restart again to ensure the add-on compatibility checking was disabled.

2.If you want to use and test your incompatible add-ons, this is "important""DO NOT ENABLE" the add-on compatibility checking in the warning dialog in the Add-on window by accident.

3.To disable add-on compatibility checking onced enabled, type about:config in the address bar and press Enter.

1. Do Filter Search: extensions.acr.firstrun
2. Set Value to: True
3.Then restart twice as you did in step 1.

This review is for a previous version of the add-on (0.3). 

Rated 5 out of 5 stars

Awesome. What the Nightly Build Tester plugin should have been ;-)

This review is for a previous version of the add-on (0.1). 

Rated 5 out of 5 stars

Works as charm on FF3.7! Already submitted report for all known-to-work add-ons! Mozilla should be created such system so looooong ago!

This review is for a previous version of the add-on (0.1). 

Rated 4 out of 5 stars

It a good idea. Note: don't forget addon you pick is not test and can put your firefox at risk. thank to this addon. i can use my Xmark again :) it a life saver!

This review is for a previous version of the add-on (0.1). 

Rated 5 out of 5 stars

Great idea. works like a charm so far.

This review is for a previous version of the add-on (0.1).