|Summary:||Text invisible in Firefox after Fedora 27 upgrade [Fixed by Firefox 58]|
|Product:||[Fedora] Fedora||Reporter:||Andrew Cashner <andrewacashner>|
|Component:||firefox||Assignee:||Martin Stransky <stransky>|
|Status:||CLOSED EOL||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||27||CC:||alexl, alick9188, flower.henry, gecko-bugs-nobody, jhorak, john.j5live, pjasicek, rhughes, rstrode, sandmann, stransky|
|Fixed In Version:||Doc Type:||If docs needed, set a value|
|Doc Text:||Story Points:||---|
|Last Closed:||2018-11-30 23:25:36 UTC||Type:||Bug|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
Description Andrew Cashner 2017-11-16 14:35:11 UTC
Created attachment 1353541 [details] Screenshot of Fedora magazine page with invisible text Description of problem: The text on many websites is invisible in Firefox after the upgrade to Fedora 27. Version-Release number of selected component (if applicable): 57.0 How reproducible: Try to view a site like https://fedoramagazine.org/upgrading-fedora-26-fedora-27/ or www.youtube.com in Firefox. Steps to Reproduce: 1. Open https://fedoramagazine.org/upgrading-fedora-26-fedora-27/ in Firefox Actual results: Text is invisible. Expected results: Text should be visible. Additional info: This change only happened after the upgrade. It does not affect every site. I am guessing it has to do with default CSS settings.
Comment 1 Alick Zhao 2017-11-18 19:53:29 UTC
Also seen on Fedora 26 with Firefox 57. Not seen on Android.
Comment 2 henryjr 2017-11-19 02:11:11 UTC
How to reproduce (Fedora 26): $ fc-match serif times.ttf: "Times New Roman" "Regular" $ fc-match sans-serif arial.ttf: "Arial" "Regular" $ cat > 1.html <!doctype html> <html> <body style="font-family: serif"> hello <span style="font-family: sans-serif">world</span> </body> </html> ^D $ ruby -run -ehttpd . -p8000 & $ firefox http://127.0.0.1:8000/1.html The page shows only the single word "world", instead of the "hello world" text. If you open 1.html using the file:// scheme, it shows the expected "hello world".
Comment 3 henryjr 2017-11-20 06:31:37 UTC
Alright, so it's an issue w/ a new sandbox mechanism. I have webfonts installed in /opt/share/fonts/webfonts/ dir & Firefox refuses to read any font files from that dir. I added /opt/share/fonts/webfonts/ to security.sandbox.content.read_path_whitelist (in about:config), restarted Firefox, and I no longer see the bug. More info about the sandbox: http://www.morbo.org/2017/11/linux-sandboxing-improvements-in.html
Comment 4 Alick Zhao 2017-11-21 02:16:03 UTC
(In reply to henryjr from comment #3) > Alright, so it's an issue w/ a new sandbox mechanism. I have webfonts > installed in /opt/share/fonts/webfonts/ dir & Firefox refuses to read any > font files from that dir. > > I added /opt/share/fonts/webfonts/ to > security.sandbox.content.read_path_whitelist (in about:config), restarted > Firefox, and I no longer see the bug. > > More info about the sandbox: > http://www.morbo.org/2017/11/linux-sandboxing-improvements-in.html Thanks henryjr! The link is very helpful. For me it turns out to be caused by locally installed TeX Live, which is the case in upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1418240
Comment 5 Alick Zhao 2017-11-28 23:09:04 UTC
Seems it has been fixed for Firefox 58: https://bugzilla.mozilla.org/show_bug.cgi?id=1412090 Until Firefox 58 lands in Fedora, the walkaround is to add nonstandard font paths (with trailing /) to security.sandbox.content.read_path_whitelist (in about:config).
Comment 6 Ben Cotton 2018-11-27 13:49:54 UTC
This message is a reminder that Fedora 27 is nearing its end of life. On 2018-Nov-30 Fedora will stop maintaining and issuing updates for Fedora 27. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '27'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 27 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Comment 7 Ben Cotton 2018-11-30 23:25:36 UTC
Fedora 27 changed to end-of-life (EOL) status on 2018-11-30. Fedora 27 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.