It appears the LogMeIn add-on was just updated. I installed "LogMeIn, Inc. Remote Access Plugin version 1.0.0.664" when I used the service today,then upgraded to Firefox 5. No compatibility objection was raised. I logged on to a remote PC and all seemed to work as usual.

You are lucky. I have had to switch to IE 8 for now to access logmein. It started to happen a few days ago and reported no compatible plug-in in for Firefox 5.0 half an hour ago.

@rodneyg41, try uninstalling the old add-on from Firefox, then logging in to LogMeIn again. I'm not sure if they offer you the Firefox plugin every time if you don't have it, but sooner or later the server should push it to you.

I had the same problem and I am now using IE 9 at the moment for LogMeIn. I downgraded to Firefox 3.6 in the end as Mozilla removed version 4 rom the old version website (no longer supported apparently). I will be watching what happens now closely as I do not see having all my plugins break every time Fiefox is updated as a viable btrowser solution anymore. I do not understand why the version numbering has to work this way. It creates an unnecessary debacle for everyone who develops plugins with absolutly no benift that I can see.

No problem with Logmein using FireFox 5 here! Works great.

I'm using Firefox beta 7 and the plugin for remotely anywhere works fine. The latest version of the plugin is 1.0.0.664 (which you can get here).

Alternatively the old versions work as well if you override the compatibility using Mozilla's Add-on Compatibility Reporter.