
You may then get a message on the left side that says only this time or remember, click remember. There is a message bar/line above the error message above saying Allow to run “Garmin Communicator” that runs width of the page with this written on the left then on the right you will see this below. You will get a message saying NOT supported, don’t panic. Once this is done you will be asked to restart Firefox.Ĭonnect your GPS and go to and the Cache you want to load.
UNINSTALL GARMIN COMMUNICATOR PLUGIN MAC INSTALL
Then go to where you saved Communicator Plugin 420.exe and install it. I ask you to do this step because Communicator Plugin 421 was issued and was not digitally signed and since been removed and you can not install a lower version of any plug-in that is already installed.


You should restart the browser if not asked. You should then go to the top of Firefox and open Tools then Add-ons then Extensions then find Communicator Plugin (which will likely show disabled) then click remove. So we need to download the Communicator Plugin 420.exe from the link above. What I did learn is the last digitally signed Garmin Communicator Plug-in can be downloaded here. This problem also appears to surface when we get a JAVA update and we have to repeat this fix.

This was done to protect us as the consumer from hacking etc. What I have learned in all this is it is NOT totally true that FireFox no longer supports the Communicator Plug-in, the issue is Firefox no longer supports non digitally signed plug-ins. This has been a problem for well over a year or so. Many of us that have a Garmin GPS for Geocaching have run into the dreaded FireFox no Longer supports Garmin Communicator Plug-in message below. This post has been superseded by this post due to Firefox has closed this fix with their latest update.
