I can't seem to add bookmarks to BookMacster when I'm in Firefox. (This has happened in all the recent versions of Firefox; I'm now using Firefox 40.0.) When I click on the BookMacster icon to add a bookmark, the drop-down menu has a grayed-out message: "Please check add-on in BookMacster > Manage Browser Add-Ons." I've made sure the Firefox add-on was installed, and I tested it by clicking "Test." No problem there; it says it's working. However, I always get the "Please check..." message when I try to add a bookmark. I have no problems in Chrome and Safari. Any help is greatly appreciated!!