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Firefox & Yahoo mail

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Starting on 1/2/2022, every time I go to access my Yahoo mail; I've been getting a dialog box that states "The continued use of the Firefox Browser might cause issues with features, usability & accessibility to Yahoo Mail. To continue without issues, we suggest that you download Chrome, IE, Safari". What has happened to FF or is it a Yahoo issue? Also, it's only after I click on my mail icon on my home page to open my mail. This is quite annoying to have to click off the box and wait for the page to reload about as fast as NetZero dial-up of the mid 90s.

Starting on 1/2/2022, every time I go to access my Yahoo mail; I've been getting a dialog box that states "The continued use of the Firefox Browser might cause issues with features, usability & accessibility to Yahoo Mail. To continue without issues, we suggest that you download Chrome, IE, Safari". What has happened to FF or is it a Yahoo issue? Also, it's only after I click on my mail icon on my home page to open my mail. This is quite annoying to have to click off the box and wait for the page to reload about as fast as NetZero dial-up of the mid 90s.

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Hi, do you run Avast AntiTrack or AVG AntiTrack? The reason I ask is that your Firefox has a characteristic tag on its user agent string:

Mozilla/5.0 (Windows NT 10.0; rv:96.0) Gecko/20100101 Firefox/96.0/UHixOG9S-06

I believe that's meant to randomize your browser identity in web logs, but for sites that check your browser version, like the Mozilla Add-ons site, it may cause misidentification.

I don't know whether that is causing the Yahoo! Mail issue, but it seems similar to this thread where the user needed to uninstall AVG AntiTrack to get rid of site warnings:

https://support.mozilla.org/questions/1362947