Public bug reported: I spotted the bug on Youtube and a few other google websites after an automatic update to firefox quantum 57.0 64-bits, and found the bug reported to mozilla here: https://support.mozilla.org/en- US/questions/1186663.
=> Using one of my installed fonts for all websites "fixes" the issue (sans-serif) => Using Roboto replicates the issue on all websites (or more than previously, I didn't check everywhere) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: firefox 57.0+build4-0ubuntu0.16.04.5 ProcVersionSignature: Ubuntu 4.4.0-101.124-generic 4.4.95 Uname: Linux 4.4.0-101-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.1-0ubuntu2.13 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: anne-marie 2493 F.... pulseaudio BuildID: 20171115095126 Channel: Unavailable CurrentDesktop: Unity Date: Sat Nov 25 22:13:34 2017 EcryptfsInUse: Yes Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationDate: Installed on 2014-09-26 (1155 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) IpRoute: default via 192.168.1.1 dev eth0 proto static metric 100 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.62 metric 100 Locales: extensions.sqlite corrupt or missing MostRecentCrashID: bp-308e2810-1c4c-4555-b297-b86711170928 Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=57.0/20171115095126 (In use) RunningIncompatibleAddons: False SourcePackage: firefox SubmittedCrashIDs: bp-308e2810-1c4c-4555-b297-b86711170928 bp-0cad8d28-c93f-4730-9252-2fc122161224 bp-2627122b-5e51-413a-9cea-60bd22161202 Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to xenial on 2016-09-24 (427 days ago) dmi.bios.date: 05/11/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N56VZ.204 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N56VZ dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN56VZ.204:bd05/11/2012:svnASUSTeKCOMPUTERINC.:pnN56VZ:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN56VZ:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N56VZ dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. ** Affects: firefox (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734483 Title: text missing on websites To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1734483/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs