1731427 - bold text on github.com renders as if it were not bold

Status: RESOLVED DUPLICATE of bug 1732629

(Core :: Graphics: Text, defect)

Description

[Frank Topel]

Attachment: Bildschirmfoto 2021-09-18 um 09.46.50.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:92.0) Gecko/20100101 Firefox/92.0

Steps to reproduce:

1. Open https://github.com/franktopel/bold-fonts-defect-firefox/blob/main/README.md

Actual results:

2. Firefox 92 / MacOS renders "render this text bold" as if it was not bold, just like regular text.

Expected results:

2. The words "render this text bold" should be in a bold font.

Comment 1

[Frank Topel]

Attachment: Bildschirmfoto 2021-09-18 um 09.48.35.png

Comment 2

[Frank Topel]

Attachment: Bildschirmfoto 2021-09-18 um 09.48.47.png

The same problem exists in Firefox developer edition as well.

Comment 3

[Frank Topel]

Attachment: Bildschirmfoto 2021-09-18 um 09.53.17.png

Compare this screenshot which shows how current Chrome/MacOS renders this readme.

Comment 4

[Frank Topel]

Attachment: Bildschirmfoto 2021-09-18 um 10.07.45.png

MacOS 12, MacBook Air (M1, 2020)

Comment 5

[Frank Topel]

Please note that the h1 in the README also doesn't render bold.

Comment 6

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

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

Comment 7

[Jonathan Kew [:jfkthame]]

I'm not seeing this problem on an Intel-based MacBook Pro running Monterey beta -- the bold text works OK here. Also not seeing it on an M1-based MacBook Air running Big Sur (macOS 11.4). So it seems to be quite version-specific...

We've seen another issue on Monterey beta where font rendering seems to behave differently depending whether the application is built for the Intel or ARM architectures -- I wonder if this might be similar?

Frank, if you run Firefox under Rosetta (Intel emulation) on the M1 MacBook Air, does that make a difference? (Locate the Firefox application and use the Finder's Get Info panel, and check the Open using Rosetta option.)

Comment 8

[Frank Topel]

Firefox 92 under Rosetta:

Comment 9

[Frank Topel]

Im somehow cannot add attachments any more. Rendering problem persist.when run with Rosetta.

Comment 10

[Frank Topel]

Attachment: Firefox 92 / Rosetta

Comment 11

[Frank Topel]

Sidenote: The same problem exists on another large site.

Compare https://stackoverflow.com/questions/69333251/are-there-best-practices-for-creating-themeable-components-based-on-css-custom-p

Comment 12

[Frank Topel]

Attachment: SO Firefox 92.0

Comment 13

[Frank Topel]

Attachment: SO Chrome 93.0

Comment 14

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

The severity field is not set for this bug.
:lsalzman, could you have a look please?

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