The fix by bugrasan works OK and gets the emojis down to normal size however the emoji's are no longer colour but black and white. This is at least a good workaround for the time being.
I think you will find this problem will be fixed in a later version of Thunderbird. I downloaded Thunderbird 60 Beta tar.bz2 from their website. Without actually installing it I extracted the folder and ran that version of Thunderbird from within that folder. It will automatically pick up you settings and email addresses etc from the version you have installed. It worked fine and the emojis contained in this version of Thunderbird are of normal size and are coloured. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1761844 Title: Very large emojis displayed in subject line and in the email list Status in Mozilla Thunderbird: Invalid Status in thunderbird package in Ubuntu: Confirmed Bug description: The list of emails received from Thunderbird shows emojis. This does not happen with all accounts. It appears to be with the last email address added. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: thunderbird 1:52.6.0+build1-0ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15 Uname: Linux 4.15.0-15-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: diego 1607 F...m pulseaudio /dev/snd/controlC0: diego 1607 F.... pulseaudio /dev/snd/controlC1: diego 1607 F.... pulseaudio BuildID: 20180131200234 Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Fri Apr 6 15:58:17 2018 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 2018-04-05 (1 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404) IpRoute: default via 181.31.1.1 dev enp2s0 proto dhcp metric 100 169.254.0.0/16 dev enp2s0 scope link metric 1000 181.31.1.0/24 dev enp2s0 proto kernel scope link src 181.31.1.84 metric 100 IwConfig: lo no wireless extensions. enp2s0 no wireless extensions. Locales: extensions.sqlite corrupt or missing PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=52.6.0/20180131200234 (In use) RfKill: RunningIncompatibleAddons: False SourcePackage: thunderbird Themes: extensions.sqlite corrupt or missing UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/14/2012 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F4 dmi.board.name: GA-78LMT-S2 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd08/14/2012:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-S2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-S2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-78LMT-S2 dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1761844/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp