Thank you for reporting this bug to Ubuntu. Ubuntu 15.04 (vivid) reached end-of-life on February 4, 2016.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed. ** Changed in: firefox (Ubuntu) Status: Triaged => Won't 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/1455103 Title: Firefox scales its interface inconsistently with the GNOME and Unity desktop environments Status in Mozilla Firefox: New Status in firefox package in Ubuntu: Won't Fix Bug description: - Expected: <https://launchpadlibrarian.net/206501594/Expected.png>. - Real: <https://launchpadlibrarian.net/206501632/Real.png>. CASE 1: NOT SCALING 1. Open the "Firefox" application, and observe the current size of buttons and the start web-page. 2. Close the "Firefox" application. 3. In the "System Settings" application, go to the "Screen Display" section. 4. Set the "Scale for menus and title bars" option to 1.38. 5. Open the "Firefox" application, and observe that the current size of buttons and the start web-page has not been scaled. CASE 2: SCALING TOO MUCH 1. Open the "Firefox" application. 2. Go to the "Tools --> Add-ons" menu. 3. In the "Get Add-Ons" tab, search for the "Zoom Page" add-on and install it. 4. In the "Extensions" tab, click on the "Zoom Page" add-on preferences button. 5. In the "Zoom Levels" tab, set the "Default Zoom Level (%)" option box to "150". 6. Go to the Firefox start page, and observe that the web-page sized has been scaled a 150%. 7. Go to the "Tools --> Add-ons" menu. 8. In the "Extensions" tab, click on the "Zoom Page" add-on preferences button. 9. In the "Zoom Levels" tab, set the "Default Zoom Level (%)" option box to "100". 10. In the "Extensions" tab, click on the "Zoom Page" add-on remove button. 11. Close the "Firefox" application. 12. In the "System Settings" application, go to the "Screen Display" section. 13. Set the "Scale for menus and title bars" option to 1.38. 14. Open the "Firefox" application, and observe that the current size of buttons and the start web-page has been scaled a 200%, instead of a 150%. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: firefox 38.0+build3-0ubuntu0.15.04.1 ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3 Uname: Linux 3.19.0-16-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: es20490446e 1699 F.... pulseaudio /dev/snd/controlC1: es20490446e 1699 F.... pulseaudio /dev/snd/controlC0: es20490446e 1699 F.... pulseaudio BuildID: 20150511103303 Channel: Unavailable CurrentDesktop: Unity Date: Thu May 14 15:05:07 2015 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 2013-05-21 (722 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) IpRoute: default via 192.168.2.1 dev eth0 proto static metric 1024 10.0.3.0/24 dev lxcbr0 proto kernel scope link src 10.0.3.1 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.120 IwConfig: eth0 no wireless extensions. lo no wireless extensions. lxcbr0 no wireless extensions. Locales: extensions.sqlite corrupt or missing MostRecentCrashID: bp-497acbba-b597-4c08-b169-55ac52150306 Plugins: IcedTea-Web Plugin (using IcedTea-Web 1.5.2 (1.5.2-1ubuntu2)) - /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-7-plugin) PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=38.0/20150511103303 RelatedPackageVersions: icedtea-7-plugin 1.5.2-1ubuntu2 RfKill: RunningIncompatibleAddons: False SourcePackage: firefox Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to vivid on 2015-04-25 (19 days ago) dmi.bios.date: 02/18/2008 dmi.bios.vendor: Phoenix Technologies, LTD dmi.bios.version: 6.00 PG dmi.board.name: MS-7358 dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD dmi.board.version: Fab D dmi.chassis.type: 3 dmi.chassis.vendor: OEM dmi.chassis.version: OEM dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM: dmi.product.name: MS-7358 dmi.product.version: OEM dmi.sys.vendor: MEDIONPC To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1455103/+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