I've tested this on Fedora Firefox and on (an ancient) MacOS. It was flawless. I'll continue testing for a while with differernt settings, BUT I no longer need to turn off privacy.resistFingerprinting in about:config to make this work.

So nice... I just open manga and read. :-)

Currently I am getting these errors regardless of whether privacy.resistfingerprinting is TRUE or FALSE.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2. (Reason: CORS request did not succeed). Status code: (null).
downloadable font: download failed (font-family: "Roboto" style:normal weight:400 stretch:100 src index:0): bad URI or cross-site access not allowed source: https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2. (Reason: CORS request did not succeed). Status code: (null).
downloadable font: download failed (font-family: "Roboto" style:normal weight:400 stretch:100 src index:0): bad URI or cross-site access not allowed source: https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2

@LBonne24 I decided to give it another shot to check out a new manga, and the pages still don’t load.

Yes, same here.

The web console doesn't reveal any outright errors, so this seems like significant progress. Thanks to everyone working on this!

In web tools, all network items are succeeding. The console gives these warning items...

Layout was forced before the page was fully loaded. If stylesheets are not yet loaded this may cause a flash of unstyled content. stylesheets-manager.js:664:11
Preload of https://labs.j-novel.club/embed/v2/qsc_worker.js?v=1.0.3 was ignored due to unknown “as” or “type” values, or non-matching “media” attribute. PRT-3SW6OYA
Preload of https://labs.j-novel.club/embed/v2/drm_worker.js?v=1.0.3 was ignored due to unknown “as” or “type” values, or non-matching “media” attribute. PRT-3SW6OYA
downloadable font: Glyph bbox was incorrect (glyph ids 17 26) (font-family: "breader" style:normal weight:400 stretch:100 src index:1) source: https://labs.j-novel.club/embed/v2/5e412dbde1fe76b9cada.ttf?h0ib59
The resource at “https://labs.j-novel.club/embed/v2/dc8666fd2134bed76766.svg” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. PRT-3SW6OYA
The resource at “https://labs.j-novel.club/embed/v2/75171192225d219a4941.svg” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. PRT-3SW6OYA

This is in Firefox on Linux and Mac.

These are the errors showing up in the Browser Console

Preload of https://labs.j-novel.club/embed/v2/drm_worker.js?v=1.0.3 was ignored due to unknown “as” or “type” values, or non-matching “media” attribute. PRT-I4KOSZQ
Request for font "Hiragino Kaku Gothic ProN" blocked at visibility level 2 (requires 3)
stylesheets-manager.js:664:11
Request for font "Meiryo" blocked at visibility level 2 (requires 3)
stylesheets-manager.js:664:11
xbembed: Loading info... loader.js:1:1778
xbreader 0.37.0-1715488683104 xbreader.js:2:295334
The resource at “https://labs.j-novel.club/embed/v2/dc8666fd2134bed76766.svg” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. PRT-I4KOSZQ
The resource at “https://labs.j-novel.club/embed/v2/75171192225d219a4941.svg” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. PRT-I4KOSZQ

I have a separate, long-standing problem with not being able to read manga that started sometime last year...

@jpwong thanks for the heads-up on the Cloudflare issues. This must be a huge problem if it's been going on since last year.

Happily I have no problem reading novels, so I'll focus on that for now.

I had Cloudflare problems loading manga earlier this morning, but they only lasted 15 - 20 minutes. This has happened to me 2 to 3 times this month, but they are intermittent and clear up pretty fast (at least for me)

Happily I have no problem reading novels, so I'll focus on that for now.

Cloudflare.... I had no idea. The web is so complicated now.

Today, I'm getting a new error when I try to load the manga reader:

ERROR 9500
Failed to fetch prpb

This happens regardless of whether I have "privacy.resistfingerprinting on or off. This is with Firefox on Linux.

I was going to say that I was having failures with manga in the iOS app and Safari browser, and point up you to this thread with a mention of Cloudflare problems…

But then I tried the app again, and the manga appears to be loading for me once more in both app and Safari.

ERROR 9500
Failed to fetch prpb

This happens regardless of whether I have "privacy.resistfingerprinting on or off. This is with Firefox on Linux.

What browser are you using? And do you have any browser extensions or VPN or such?