Separate Security Issue, please update your Flash 28.0 r0 Flash Player Version: 30.0.0.113 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only> HI, Firefox is a web browser and has nothing to do with zoom https://support.zoom.us/hc/en-us/categories/200101697 though there is one Extension that has been submitted by their Developers and ok'd by Mozilla to work with Firefox. They each have their own support page and contact page. https://addons.mozilla.org/firefox/addon/zoom-new-scheduler/ Either way, Firefox has nothing to do with your issue and you should seek help from the URL"s provided.