Rated 5 out of 5 stars

It is a good add-on and was working fine while on TB 17.x Upgraded to 24.0 today and now every email show with (>) even for the ones that are sent directly to me and should be shown with (>>) instead. Anyone know how to fix this, would be greatly appreciated.

Update: Sept 19: After I wrote the review, the add-on developer updated to fix this issue for for TB 24.0. Great Job and Thank You for quickly fixing it.

Đánh giá này là cho một phiên bản trước của tiện ích (0.5). 

I just uploaded version 0.6, which fixes the problem you describe. It will probably take a while until it will have been reviewed by the AMO team. Meanwhile, you may want to download a pre-release from https://dl.dropboxusercontent.com/u/1526797/tb-personal-level-indicator-0.6.xpi.