Running XP with Firefox 44.0, had same issue. Called Garmin and spoke with a rep who had me open Firefox, then "CTRL+T"(for TOOLS in the toolbar), then select "ADD-ONS". This should bring up your Add-ons; Find "Garming Communicator"; To the right of Garmin Communicator, change the drop down menu to "Always Active" (mine were set to "Ask to Activate". Hopefully it will work for you as it did me on my XP and WIN7 PCs running Firefox. Good Luck!