Thanks for the report Patrick. Are we talking about scaling the webcontents, or the user interface (tabs bar, address bar, …), or both?
Can you test whether upstream firefox builds (which you can download from https://www.mozilla.org/firefox/download/thanks) are similarly affected? I see that you're running in a Wayland session. Does this also affect Xorg sessions? ** Changed in: firefox (Ubuntu) Status: New => Incomplete -- 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/1905337 Title: Scaling of Firefox doesn't adjust when moved across Monitors with Different DPis Status in firefox package in Ubuntu: Incomplete Bug description: Firefox doesn't automatically scale up/down when dragged across screens with different DPis like other apps and keeps the Scaling of the monitor it was opened on. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 83.0+build2-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65 Uname: Linux 5.4.0-54-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.12 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: patrick 1854 F.... pulseaudio /dev/snd/controlC0: patrick 1854 F.... pulseaudio BuildID: 20201112153044 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Mon Nov 23 18:40:44 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:354 DefaultProfileThemes: extensions.sqlite corrupt or missing ForcedLayersAccel: False InstallationDate: Installed on 2020-11-18 (5 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) IpRoute: default via 192.168.1.1 dev wlp2s0 proto dhcp metric 600 169.254.0.0/16 dev wlp2s0 scope link metric 1000 192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.11 metric 600 Profile0Extensions: extensions.sqlite corrupt or missing Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) Profile0Locales: extensions.sqlite corrupt or missing Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:354 Profile0PrefSources: prefs.js Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=83.0/20201112153044 (In use) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/09/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.11.10 dmi.board.name: 02TH5P dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 31 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.11.10:bd07/09/2020:svnDellInc.:pnPrecision55302-in-1:pvr:rvnDellInc.:rn02TH5P:rvrA00:cvnDellInc.:ct31:cvr: dmi.product.family: Precision dmi.product.name: Precision 5530 2-in-1 dmi.product.sku: 08AC dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1905337/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

