Wrong font weight – only in Firefox

I was wondering why that whole thread was removed! I liked it being there for archiving. There was quite some valuable research in there.

Either way, happy to see you repost!

I’m sorry to say it’s not an easy fix, but what would help me out is if you could send me the following information:

With OMGF disabled, please open up your Developer Tools on a Windows 7 / Firefox machine by pressing F12.

Then click on the Network tab and reload the page. I need to see which font files it uses for the correct rendering to occur. If it’s WOFF (hopefully) or TTF (which would be awful, but okay) I might be able to do something.

Looking forward to your reply!

maybe he had a bad day ??

thanks so much for looking into it, I really appreciate it. ?? So I did as per your request and it’s woff2. See screenshot.

Yup, extra reasons for allowing a link to your own support forum! But that’s totally off-topic.

I was hoping for a different file format. So, Google Fonts must be loading a different WOFF2 file than the one OMGF is downloading.

Could you share your user-agent? Then I’ll add a filter, allowing to override the user-agent used by OMGF to fetch the fonts. Hopefully that’ll do it.

Hi Daan,

is this what you need?

User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Thanks let’s hope that will do the trick ??

Yes, that’s it! Thnx. I’ll work on it later today!

I just released an update, v5.6.3, which includes a filter, called omgf_optimize_user_agent.

This filter allows you to change the User-Agent used to fetch the fonts from the Google Fonts API.

So, you could try this. Add the following code to your (child) theme’s functions.php file or a custom plugin:

add_filter('omgf_optimize_user_agent', 'daan_set_win7_user_agent');

function daan_set_win7_user_agent($user_agent) {
    return 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0';
}

After you’ve added this code, hit Save & Optimize in OMGF’s settings screen.

Do the fonts appear correct now on the Windows 7 machine? And more importantly, do they still appear correct on newer machines? (they should)

Let me know how it went!

it seems to be working :-))))) thank you sooo much man, you’re the best.

Had to clear the cache in the OMGF plugin though.

Now when I remove the code snippet from function.php it is still showing the fonts correctly? is it expected behaviour? or was something misconfigured that got fixed through the plugins cache clearing….

Thanks again, so happy this is fixed now. ??

@hermitc maybe the new filter can help resolve your issue as well?

Now when I remove the code snippet from function.php it is still showing the fonts correctly? is it expected behaviour? or was something misconfigured that got fixed through the plugins cache clearing….

It’s not a misconfiguration. By changing the User-Agent you’re basically adding backwards compatibility, which results in slightly larger WOFF2 files.

I’ve tested it and the difference in filesize per WOFF2 file is ~0,2KB. Which is practically nothing. So, I’m going to run a few more tests and maybe make the User-Agent you shared the default from now on. Or, add it as an option under Advanced Settings.

To be continued!

I’m going to add this as the new default in the next release. I’ve ran some tests and all font files are 100-200 bytes larger, which seems like a good trade off if it increases compatibility.

Thanks for your cooperation!

Hi Daan,

really happy that this is resolved now. Just wanted to let you know, as soon as I use the preload option of a font its back to the old light font style. This is just meant as an information for you, I can happily live without that preload feature. ??

Best regards, Michael

Hmm, that makes no sense. Could you enable one preload, and let me know? So I can take a look. I suspect it’s still loading an old file, or something — which might be a bug.

Hi Daan,

sorry for late reply. I was not able to reproduce it until now – which is good news. Maybe it was a caching issue, I have a pretty strong caching on server side.

I was able to reproduce it once, giving me the following error in the console, but unfortunately I cannot tell which setting I tried out when it happend, so you might as well ignore it. Thanks alot, my customers are all happy again ??

Yeah, then it’s probably page cache. Great! Thanks for getting back to me!

Sorry for the late response, busy days…

It’s working! Thanks a lot for fixing this issue.

Funny fact: filter omgf_optimize_user_agent (as described above) is not needed. Tried it with and without the filter (caches of cache-plugin/theme/omgf cleared) – no difference. It works fine but no difference.

Thanks again!

—
OMGF plugin v5.6.4
WP Theme DIVI v4.21.2
WP v6.2.2
Firefox v115.1
Windows 8.1

• This reply was modified 1 year, 3 months ago by hermitC. Reason: added versions