Can't not update FireFox if one doesn't have a smartphone, too hard to contact to as a question u do not make yourself available not helpful?
I have FireFox on my laptop but I don't have a smart phone & up dates keep asking to input mobile number and when I want it want update laptop only smart phone not practical for someone on low income, I keep my laptop but not my phone when only have two calls a month may be, so why would I have a smart phone.
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That is part of the sync process. Turn it off. about:preferences#sync
Separate Security Issue: Update your Flash Player Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).
Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.
Flash Player Version: Version 27.0.0.170
https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>
https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration