Unsupported browser message since 31.2.0.1 update

[gi_jimbo]

I've run into the following message on a number of sites today (well, 2 anyways but the message is presented identically).
"Unfortunately, your browser is unsupported. Please switch to a supported browser to view rich content, log in and reply."
The message shows up in the top of the browser window on a yellowish background.
I know there were a couple of updates recently so I'm not totally sure which one the messages started to show up with but I'd say it's been within the past 3 or 4 days.

Please always mention the name/domain of the website in question in your topic title.
https://discourse.cmake.org/
https://community.monday.com/

Please try and include any relevant output from the Toolkit Error Console or the Developer Tools Web Console using the following procedure:

1) Clear any current output
2) Navigate or refresh the page in question
3) Copy and paste Errors or seemingly relevant Warnings into a single [ code ] block.

https://discourse.cmake.org/

Code: Select all

uncaught exception: Unsupported browser detected  
(unknown)

https://community.monday.com/

Code: Select all

uncaught exception: Unsupported browser detected  
(unknown)
cloudfront_viewer_country_value  
20f4f3d6f78be36f6275a81688a73184fc62ee5c.js:19:7
XML Parsing Error: syntax error
Location: https://pips.taboola.com/
Line Number 1, Column 1:

[vannilla]

Try changing the user agent string to latest Firefox or Chrome and see what happens.
You can do it with add-ons like sasuga or PermissionPlus, which let you change without impacting other sites as that might cause further breakage somewhere else.

[therube]

Try changing the user agent string to latest Firefox

Given how the site reacted initially, I never expected a UA change to work, but it did.