Olivier, since I wrote comment #26, I actually got it working and since then it seems to be reliable. What I did was:
1. Stopped Thunderbird, which had been running in safe mode. 2. sudo apt remove thunderbird-locale* 3. sudo apt install thunderbird-locale-en-gb 4. Start Thunderbird normally. I've since stopped and started it about 5 times normally, and all seems to work correctly. -- 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/1901829 Title: thunderbird fails to open, xml parse error Status in thunderbird package in Ubuntu: Confirmed Bug description: launching thunderbird opens a small browser window displaying the following error: XML Parsing Error: undefined entity Location: chrome://messenger/content/messenger.xhtml Line Number 905, Column 3: <key id="openLightningKey" --^ when launched from the command line, the following errors appear: [calBackendLoader] Using Thunderbird's libical backend Extension error: Error while loading 'jar:file:///usr/lib/thunderbird/extensions/messagingm...@mozilla.com.xpi!/manifest.json' (NS_ERROR_FILE_NOT_FOUND) resource://gre/modules/Extension.jsm:570 :: readJSON/</<@resource://gre/modules/Extension.jsm:570:20 onStopRequest@resource://gre/modules/NetUtil.jsm:128:18 Extension error: Error while loading 'jar:file:///usr/lib/thunderbird/omni.ja!/chrome/messenger/search-extensions/twitter/manifest.json' (NS_ERROR_FILE_NOT_FOUND) resource://gre/modules/Extension.jsm:570 :: readJSON/</<@resource://gre/modules/Extension.jsm:570:20 onStopRequest@resource://gre/modules/NetUtil.jsm:128:18 from desktop GUI it is possible to launch "Compose new message" or "Contacts" window, then in "Help" menu select "Restart with add-ons disabled", then the normal mail/calendar window opens and functions normally cheers ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: thunderbird 1:78.3.2+build1-0ubuntu1 ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14 Uname: Linux 5.8.0-25-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu50 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: frankland 7570 F.... pulseaudio /dev/snd/controlC1: frankland 7570 F.... pulseaudio BuildID: 20201006011220 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Wed Oct 28 10:05:04 2020 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 2018-03-28 (945 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1) IpRoute: default via 193.48.109.1 dev enx9cebe86f11b0 proto dhcp metric 100 default via 193.48.109.1 dev wlp1s0 proto dhcp metric 600 169.254.0.0/16 dev enx9cebe86f11b0 scope link metric 1000 193.48.109.0/24 dev enx9cebe86f11b0 proto kernel scope link src 193.48.109.26 metric 100 193.48.109.0/24 dev wlp1s0 proto kernel scope link src 193.48.109.26 metric 600 Locales: extensions.sqlite corrupt or missing PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/thunderbird/omni.ja:greprefs.js:732 PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=78.3.2/20201006011220 (In use) RunningIncompatibleAddons: False SourcePackage: thunderbird Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to groovy on 2020-10-23 (4 days ago) dmi.bios.date: 01/07/2020 dmi.bios.release: 1.17 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.17.1 dmi.board.name: 0DW6V0 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.17.1:bd01/07/2020:br1.17:svnDellInc.:pnLatitude5580:pvr:rvnDellInc.:rn0DW6V0:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Latitude dmi.product.name: Latitude 5580 dmi.product.sku: 07D1 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1901829/+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
