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New Firefox either won't load, or if it loads, won't work. Won't search, won't sync, won't anything. Old version was fine

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I am using an Acer Spin laptop with a 256 Gb ssd and an Intel core i5 7200U 2.5GHz processor, with 8Gb of ram, running Windows 10. I've used Firefox for years on various machines. I also use it on a Linux laptop and an Android phone. And I use a portable version on a memory stick. All fine. But the new revamp / upgrade doesn't run on my Acer. I've uninstalled it, cleaned out unused files, removed registry entries, and at last got it to run. But it's now a zombie. It won't search, won't let me log in to sync. Nothing. Any help really appreciated as I am having to rely on other browsers I'd rather not use and which don't work well with some browser-based knowledge resources I use.

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Réiteach roghnaithe

hi, can you check if downloading the update to firefox 73.0.1 that was released just now can address your issue?

https://www.mozilla.org/en-US/firefox/all/

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Réiteach Roghnaithe

hi, can you check if downloading the update to firefox 73.0.1 that was released just now can address your issue?

https://www.mozilla.org/en-US/firefox/all/

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Thank you so much. That seems to have worked. Really appreciated.

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great, thanks for reporting back :))

the update contained a fix for the symptoms you've described - the original issue was mainly caused by running firefox in compatibility mode for older windows versions. you could still check if this was the case for you as well and if so turn off compatibility settings for Firefox as they'll do more damage than good: https://www.tenforums.com/tutorials/15523-change-compatibility-mode-settings-apps-windows-10-a.html#option1