I found a (not very clean) workaround based on https://github.com/SebastianSimon/firefox-selection-fix.
See https://github.com/MAccadia/firefox-selection- fix/tree/primary_select_fix -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1888942 Title: marked url in firefox by using one click isn't copied to clipboard, only with a triple mouse-click Status in Mozilla Firefox: Confirmed Status in firefox package in Ubuntu: Invalid Bug description: Hi, if I click in an url in firefox, the whole url ist marked, i.e. highlighted. If I now use a click on the mousewheel to paste the content of the clipboard into another software, I discover that the url wasn't copied into the clipboard - the previous content ist filled in. That's confusing to me. I would expect: If I can mark an url in Firefox with a single mouse-click, which looks like a marking with a triple click, then it should be copied also in the clipboard. That would be a consisting behavior. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 78.0.2+build2-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: matthias 1453 F.... pulseaudio /dev/snd/controlC1: matthias 1453 F.... pulseaudio /dev/snd/pcmC1D0c: matthias 1453 F...m pulseaudio /dev/snd/pcmC1D0p: matthias 1453 F...m pulseaudio BuildID: 20200708170202 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Sat Jul 25 16:44:27 2020 DefaultProfileExtensions: extensions.sqlite corrupt or missing DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) DefaultProfileLocales: extensions.sqlite corrupt or missing DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:730 DefaultProfilePrefSources: prefs.js DefaultProfileThemes: extensions.sqlite corrupt or missing ExecutablePath: /usr/lib/firefox/firefox ForcedLayersAccel: False InstallationDate: Installed on 2020-04-24 (92 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) IpRoute: default via 192.168.11.1 dev wlp4s0 proto dhcp metric 600 169.254.0.0/16 dev wlp4s0 scope link metric 1000 192.168.11.0/24 dev wlp4s0 proto kernel scope link src 192.168.11.66 metric 600 Profile1Extensions: extensions.sqlite corrupt or missing Profile1IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) Profile1Locales: extensions.sqlite corrupt or missing Profile1PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:730 Profile1PrefSources: prefs.js Profile1Themes: extensions.sqlite corrupt or missing Profiles: Profile1 - LastVersion=74.0.1/20200403064753 (Out of date) Profile0 (Default) - LastVersion=78.0.2/20200708170202 (In use) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/12/2019 dmi.bios.vendor: LENOVO dmi.bios.version: N14ET53W (1.31 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BTS06G0J dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: R90GJVAH dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN14ET53W(1.31):bd11/12/2019:svnLENOVO:pn20BTS06G0J:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BTS06G0J:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 3rd dmi.product.name: 20BTS06G0J dmi.product.sku: LENOVO_MT_20BT_BU_Think_FM_ThinkPad X1 Carbon 3rd dmi.product.version: ThinkPad X1 Carbon 3rd dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1888942/+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