Chromium-based browsers not working correctly

Chromium based browsers do not use Apple’s Webkit frameworks. If they are misbehaving that’s on them, not Apple. It’s not Apple’s responsibility to ensure third party app functionality with every update. Rather it’s the developer’s responsibility to keep their apps compatible with any changes Apple may make in a macOS update.

However there are very few reports of the same issue you are experiencing from other users. That might point to a glitch in your individual installation.

Try restarting your Mac in “Safe Mode” and test. If the issue clears then you’ll need to do more trouble shooting. Safe Mode disables all third party extensions, clears caches, and performs some routine maintenance.

I use both Google Chrome and Microsoft Edge at times and have no issues whatsoever with them.

Start up your Mac in safe mode - Apple Support

MisterFixit50 wrote:

Chromium based browsers not working correctly for some websites.

Page not rendered correctly.

Sounds like a browser issue, possible a cross platform issue— not a Mac/Apple issue.

Verify your third party browser is up to date...

For your third party app—if in doubt search the developers website or contact their: Support/Help/FAQ/Known issues/compatibility/updates…

Try a different browser that uses a different rendering engine and compare your results...

a few examples:

Safari—Webkit as its core rendering engine

FireFox—Gecko rendering engine

Chrome—Blink rendering engine

After removing Malwarebyte and Rapport did you use Safe Mode..?

If not, then do that next. see > Start up your Mac in safe mode - Apple Support

You may have some stale RV cookies in those web browsers.

for Safari > click Safari > select Clear History.. > All History > Clear History.

then do the same for the Brave, Chrome, Edge and Firefox browsers that do not work.

Also what do you have TechTool Pro monitoring and/or doing..?

Back in the old OS X days, we only used Techtool to manually run Maintenance Scripts.

The https://rvlife.com/ and the https://rvlife.com/advertising/ web pages

both display correctly for me using Safari 26.2 and Firefox 147.0.1

I can test more web sites with those two browser's if you like.

I'm not using any third-party AV-ware, Blockers, Add-on's or VPN's on my Mac's.

Are you...?

Something is wrong on your end.

EtreCheckPro is an excellent tool for finding and sorting out various problems.

Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html

Then post back here with your Report, as per > How to use the Add Text Feature When Post… - Apple Community

I did not ask for an EtreCheck Pro report while in Safe Mode.

I said to use Safe Mode followed by a normal Restart after removing third-party junk-ware.

Plus now I see that you have downloaded MacKeeper which is some of the worst Junk-Ware on the planet.

Again I have not installed any of that Junk-Ware on any of my Mac's and have no problems opening and navigating those or any other web-sites using Safari or FireFox.

Wait. After all this you are now saying that a single website is the ONLY one you are having an issue with? Everything else is okay? Is that really the case? And you’re adding Safari to the mix now too?

What’s the common denominator here… the website itself, right? All the browsers you list fail to render this single website correctly and you have deduced there is something wrong with all those browsers and/or macOS itself and not the website?

Please explain.

That would indicate a problem with the site, not the browsers.

Then I would think that website is poorly coded if none of the browsers listed work. There is no guarantee that that website wasn’t coded by an incompetent developer who chose not to test their work with commonly used browsers.

MisterFixit50 wrote:

Sorry, I misunderstood.

No problem. No harm done.

"Plus now I see that you have downloaded MacKeeper which is some of the worst Junk-Ware on the planet. "

I agree, which is why I deleted MacKeeper after one use.

Sometimes that's all it take to corrupt your data and file system.

What is a really good uninstaller for MacOS?

Downloading more third-party ware is not the solution, beside it look like you already have AppCleaner.

Follow the uninstall directions from MacKeeper and hope for the best.

I don't usually install junk-ware, it was on the Apple App Store, but I guess that doesn't mean anything.

Correct, just because something has made it into the App Store doesn't mean that it is safe to use.

for ref: see . Delete or uninstall apps on Mac - Apple Support