I've made it to FF 48.0.2 with X-Notifier intact... I have the vaguest recollection of FF wanting to (I forget the wording also) perhaps 'refresh the configuration' by (removing add-on?) resetting user customizations, etc. This is not something I needed so I believe there was some way to tell it to just update without changing anything pertaining to my user profile/configuration/add-ons. Worked fine. But yes, if we have more than one or few accounts, we all need to Export our X-Notifier data. Having a newer FF setup on an updated machine may take precedence over others when syncing... and affect other synced machines, for better or worse.
I have now used the X-notifier back-up to re-install the data 3 times in the past week. For some reason, X-notifier just stops recognizing, when I click the X to check for new mail. No repsonse. Click for OPTIONS, Nothing. Only when I Uninstall the Add-on, then re-install it, does it come back. Fortunately, a quick IMPORT and I am good to go again. Though I have this 'work around' it is still and odd function. - net500cg
PS ... Yes, the 'initial trouble' was started with I 'reacted to quickly' to the question. I too, do not remember the exact wording, but I know I didn't select the 'no trouble' option!! Lesson: 'Speed Kills'. Slow DOWN! - net500cg
48.0.2
I've made it to FF 48.0.2 with X-Notifier intact... I have the vaguest recollection of FF wanting to (I forget the wording also) perhaps 'refresh the configuration' by (removing add-on?) resetting user customizations, etc. This is not something I needed so I believe there was some way to tell it to just update without changing anything pertaining to my user profile/configuration/add-ons. Worked fine. But yes, if we have more than one or few accounts, we all need to Export our X-Notifier data. Having a newer FF setup on an updated machine may take precedence over others when syncing... and affect other synced machines, for better or worse.
X-notifier Backup
I have now used the X-notifier back-up to re-install the data 3 times in the past week. For some reason, X-notifier just stops recognizing, when I click the X to check for new mail. No repsonse. Click for OPTIONS, Nothing. Only when I Uninstall the Add-on, then re-install it, does it come back. Fortunately, a quick IMPORT and I am good to go again. Though I have this 'work around' it is still and odd function. - net500cg
PS ... Yes, the 'initial trouble' was started with I 'reacted to quickly' to the question. I too, do not remember the exact wording, but I know I didn't select the 'no trouble' option!! Lesson: 'Speed Kills'. Slow DOWN! - net500cg