Stopped working Rated 5 out of 5 stars

I am using Firefox 16.0.2 and I just noticed that Stay-Open Menu is not working at all. Latest version of the add-on. I had Tabs Mix Plus and Web Developer installed, I have removed them, S-O M still doesn't work.Damn shame. Could be my profile but I'm not resetting it and repairing all the damage that causes.Think Firefox's era is coming to an end actually, though Chrome won't get my vote till it gets a Master Password and a Go button.
Update: I can't figure out how to reply so I'm doing it here. Many thanks for getting back. Unfortunately I'm not going to be updating Firefox anymore as just too much stuff breaks every time they fiddle with it, so I'm staying on 16 from now into the foreseeable future. I hope you get the update changes working, this add-on of yours really does restore a vital missing piece of core functionality FF should always have had.In the meantime I've upped the review to 5, but I'll have to check the older version works.Keep it up! ;)
Update: Confirmed 2.1 works with FF 16.0.2 - Manythanks

This review is for a previous version of the add-on (2.2.1-signed). 

Confirmed that Stay-Open Menu 2.2 does not work on Firefox versions prior to 20. I've updated its compatibility information on AMO. Firefox 16.0.2 is obsolete and should be upgraded for security reasons. I haven't time to test new versions of Stay-Open Menu on all the obsolete Firefox versions, so I rely on user's bug reports for this information. Thanks for the information, although bugs should be reported as listed in the 'About this Add-on' section, rather than posted in the reviews. If you won't update Firefox for some reason, please revert to Stay-Open Menu 2.1 or install 2.2.1 which contains a tiny change to restore compatibility with older versions of Firefox (available only from the all versions page until it gets reviewed by Mozilla).