I disabled my add-ons a little while ago and now I cant enable them again. Or that's how it looks!
For instance the 'WOT' add-on says it is disabled but there it is, working as usual but Ad-block Plus says it is disabled and it is.
If I click enable, the page goes white and nothing happens. I click the white page and all the add-ons re-appear but still disabled.
I am using Firefox.
Everything's working fine other than that.
If you are still not happy with matters you may wish to consider the course of action which I would take.
Click open FF'Tools' ->'Add-ons' -> remove all individually-> re-install by fresh downloads, but only those which you feel are really necessary for you. The less you have the better because they do use up Computer resources and too many I have been led to believe can cause problems with FF.