Chrome 92 userAgent notice

[superpoincare]

Starting Chrome 92, Chrome dev tools will start warning about the usage of navigator.userAgent:

​https://blog.chromium.org/2021/05/update-on-user-agent-string-reduction.html

Although it is colored blue and not red and hence not an error message, it's better to not see it.

Many scripts user navigator.userAgent, especially wp-emoji.js which loads on all sites.

A way to continue using it is to see if navigator.userAgentData is true and prevent new Chrome from executing navigator.userAgent.

[johnbillion]

Thanks for the ticket @superpoincare.

Let's start by gathering a list of all the scripts which perform logic based on the value of navigator.userAgent then we can go from there.

[superpoincare]

Files containing navigator.userAgent

[superpoincare]

Added a file. I found the results via VS Code's search function. Ignored minified files and external library files which have those. The search query is in the file.

24 script files in total.

[SergeyBiryukov]

Replying to superpoincare:

Added a file. I found the results via VS Code's search function. Ignored minified files and external library files which have those. The search query is in the file.

# Query: navigator.userAgent
# Excluding: *jquery*,*mediaelement*,*moxie*,*react*,*thickbox*,*tinymce*,*min.js

Thanks! Just noting that Thickbox can be patched too, it's essentially considered an "adopted" library and no longer an external library at this point.

[adamsilverstein]

Time for some userAgent spring cleaning! ​https://developer.chrome.com/blog/progress-in-the-privacy-sandbox-2021-12/#user-agent-spring-cleaning

Related:

• #49198 (replaced by this ticket?) and
• #33704

[costdev]

With 6.0 RC1 tomorrow, I'm moving this ticket back to Future Release.