I've been using Firefox 115.33.0esr on my 2015 MacBook Pro running High Sierra 10.13.6, and recently Google decided to display a persistent message on every page I visit—like Gmail and Google Drive—saying that my browser isn't supported anymore. Clicking the X to dismiss the banner only helps temporarily; it comes back after a few page loads. I've even tried blocking it with uBlock Origin, but that only removes it for the current instance. I understand my OS is outdated, and I'm prepared for compatibility issues in the future. I'm looking for a way, like a browser extension or specific setting, to permanently hide this message without having to upgrade my entire setup or switch browsers. Any suggestions?
3 Answers
Instead of changing browsers or upgrading your OS, have you tried looking for browser add-ons specifically designed for this type of issue? Some might have options to hide notifications like that. Just be cautious with whatever you choose since they can sometimes be a bit hit or miss! If you find one that works, let us know!
You could try using a different user agent string to make Google think you're using a modern browser. There are extensions that let you change your user agent. Just keep in mind that this might not work forever, and some features might get broken if they rely on more recent updates. But if it’s just that banner you want to ditch, it could be worth a shot!
Honestly, the cleanest solution would be to upgrade to a newer browser. I get it, though—dealing with Google’s nagging can be better than switching everything up just to avoid one banner. But there’s really no foolproof way to permanently block that message, as Google frequently updates their scripts to counter ad blockers. You might be stuck with it for now, unfortunately.

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