1725811 - Update to FF 91.0 screwed up my Mac graphics when increased contrast is selected

Status: RESOLVED DUPLICATE of bug 1725341

(Core :: Disability Access APIs, defect)

Description

[Mel Ellington]

Attachment: FF91increaseConstrastbug.pdf

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

Start Macintosh iMac with Intel i5 running MacOS 14.xxx Mojave. I updated FF from 89x to 91.0. Then started FF and went to https://www.accuweather.com/en/us/summerland-key/33042/weather-radar/2257918 graphics.

Actual results:

I saw that there were several weird graphic anomalies: missing icons, a missing colored bar, and other graphics missing or distorted.

Expected results:

I should have seen icons and a colored bar that were not there. I went to Google.com I should have seen a rectangular text input search field. I only a small section of it was visible, albeit otherwise functional.

I had no idea why this occurred. I went back to FF 89.x and it had no such problems. After Google searching and experimenting I found out how to restore the proper graphics in FF 91.0 — I had to turn off my Macintosh System Preferences-->Accessibility-->Display-->Increase contrast. I have this set permanently to help my readability of the screen. Increased contrast has worked well with my other Mac applications — only Firefox 91.0 has these graphic deficiencies. The contrast increase is merely set to minimal. My Google Chrome (latest version) has no such display anomalies at the same Accuweather.com web site or with Google.com.

Disabling the Increase contrast is an unacceptable workaround. I would switch to Google Chrome before decreasing the contrast System-wide for the remainder of MacOS and all other applications.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Kelimutu [:kiki]]

Hi Mel,

Thanks for reporting this issue. I've seen a few tweets reporting the same problem today. In the meantime, you can try the following workaround without having to disable the Increase Contrast setting on your Mac. Let me know if the workaround works for you.

Comment 3

[Markus Stange [:mstange]]

From bug 1725341 comment #3 :

[...] this is caused by this new feature in Firefox 91:
https://www.mozilla.org/en-US/firefox/91.0/releasenotes/
Firefox now automatically enables High Contrast Mode when "Increase Contrast" is checked on MacOS

(This was added in bug 1713015.)

You can disable this in Firefox's preferences - see https://support.mozilla.org/en-US/kb/accessibility-features-firefox-make-firefox-and-we#w_overriding-page-colors , "Overriding Page Colors". You probably want to choose the value "Never".

See bug 1725978 comment 4 for more detailed instructions.