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Browser resolution has become bigger

  • 23 replies
  • 63 have this problem
  • Last reply by shukshok

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Switched on my system this morning and found that everything has become bigger in FF. The bookmark toolbar, the font size of websites..everything has increased in size. For example when I open up dailymail website, the site used to fit on screen in such a way that I could see the main headline completely, however now half of the screen is filled up with just the header (logo etc). I have around 20 websites that I had saved on the bookmark toolbar (with shortened names) and there was space for at least one more...but now I find that the toolbar length is unable to accommodate a couple of there anyway I can fix this?

All Replies (20)

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Code changes regarding HiDPI have landed in Firefox 22 and later (bug #844604).

You can modify the layout.css.devPixelsPerPx and increase or decrease the value in 0.1 or 0.05 steps to adjust the size of fonts and other elements in Firefox.

  • The layout.css.devPixelsPerPx pref is a String value parsed to a float and allows to fine tune the dimensions of all elements (user interface and web pages) more precisely (resolution 0.1 or 0.05).
  • Change the default value -1 to 1 to make it work like in previous Firefox versions (100%)
  • Use values between 0.05 and 1.0 to reduce elements in size.
  • Use values greater than 1.0 to magnify and make elements larger (percentage divided by DPI, % / DPI).

If web pages needs to be adjusted after changing this pref then you can look at the Default FullZoom Level or NoSquint extension.

Use this extension to adjust the font size for the user interface:

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Thanks for the help. Got it back to normal size but the overall interface is still cluttered. Did a check on the net and found that it is due to some problem with the 22 update. Is there any way that I can revert back to FF 21? Found a link at but I have no idea how to download it

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And it will be great if anyone can tell me how to stop FF from automatically updating

more options you can try firefox esr, which updates once a year

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In order to better assist you with your issue please provide us with a screenshot. If you need help to create a screenshot, please see How do I create a screenshot of my problem?

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Thank you!

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Attached the image. As you can see there is a gap just above the tabs while the Minimize button is somewhat superimposed on the New Tab button...not exactly browser breaking but still feel a bit irritated with it....btw the link you gave, it says the version is 17.0.7esr...should I simply download the English version?

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  1. In the Location bar, type about:config and press Enter. The about:config "This might void your warranty!" warning page may appear.
  2. Click I'll be careful, I promise!, to continue to the about:config page.
  3. search "layout.css.devPixelsPerPx" double click the result and type 1.0 and hit enter.

Modified by kobe

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Yes did that...thats what corrected the size problem of the websites and the bookmark toolbar...but this problem persists

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In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

  • Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

  • At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
  • Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

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Application Basics

       User Agent
       Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20100101 Firefox/22.0
       Build Configuration
       Theme Font & Size Changer
       Norton Toolbar
       Norton Vulnerability Protection - 5
       SPEEDbit Video Downloader
       ZoneAlarm Security Engine
 Important Modified Preferences
       Adapter Description
       ATI Radeon HD 5700 Series
       Adapter Drivers
       atiu9pag aticfx32 aticfx32 atiumdag atidxx32 atiumdva
       Adapter RAM
       Device ID
       Direct2D Enabled
       Blocked for your graphics driver version. Try updating your graphics driver to version 10.6 or newer.
       DirectWrite Enabled
       false (6.1.7600.16763)
       Driver Date
       Driver Version
       GPU #2 Active
       GPU Accelerated Windows
       1/1 Direct3D 9
       Vendor ID
       WebGL Renderer
       Google Inc. -- ANGLE (ATI Radeon HD 5700 Series )
       Incremental GC
       Prevent Accessibility
 Library Versions
       Expected minimum version
       Version in use
       NSS Basic ECC Basic ECC
       NSSSMIME Basic ECC Basic ECC
       NSSSSL Basic ECC Basic ECC
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  • Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu (once again). If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.
  • Now, a new tab containing your troubleshooting information should open.
  • At the middle of the page, you should see a button that says "Open Directory". Click it.
  • Look in the folder and delete a file named user.js (if there is one there).

Thanks in advance for your help!

Modified by kobe

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Problem solved....should have simply opened up a new window or restarted FF :p Thanks a lot for your help...

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Ist schon raffiniert, ein Thema nachträglich so abzukürzen, um nach außen hin darzustellen, als ob es gelöst wäre. Wo sind denn die anderen 4 Seiten mit den Fragen geblieben, bevor das Thema einfach von Mozilla geschlossen worden ist?

Wenn ich unter Windows 8 auf Firefox 23 update, ist die Anzeige in Ordnung. Ebenso in Ordnung ist die Anzeige in SeaMonkey 2.20 unter Windows 8, der den gleichen User-Agent wie Firefox 23 hat (Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0 SeaMonkey/2.20). Aber unter Windows 7 ist die Anzeige von SeaMonkey 2.20 nach wie vor fehlerhaft, so dass ich davon ausgehen muss, dass auch die Anzeige von Firefox 22 und 23 unter Windwos 7 immer noch fehlerhaft ist. Gibt es dazu Erkenntnisse? Vielen Dank im Voraus für die Antwort.

Im Übrigen habe ich es bereits an anderer Stelle vermerkt, dass bislang niemand von der Ausgabe von Webinhalten im Internet Explorer 11 einen ähnlichen Darstellungsfehler (2xfacher Zoom als Standard im Firefox 22 und eben im SeaMonkey 2.20) berichtet hätte. Das widerspricht den hier im Forum vorher (nämlich am Ende der ingesamt 5 Seiten zu diesesm Problem) getroffenen Aussagen, dass der "High-DPI-Support" im IE 11 sowie im Chrome 30 ähnliche Probleme schaffen würde. Offensichtlich konnte man dort das Problem besser lösen als bei Mozilla.

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Hier ist der Link zu der ursprünglichen Frage:

Diese Frage wurde aber wie bereits erwähnt von Mozilla geschlosssen.

Aber meine oben gestellten Fragen sind immer noch offen.

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hello mamefox, this is an English-speaking forum - please post your contributions in english so that they can be universally understood or if you want to get community support in german visit instead.

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Diese Seite ergibt zwischen den Angaben unter Windows 7 und unter Windows 8 für den Browser SeaMonkey 2.20 recht unterschiedliche Angaben.

Unter Windows 8: Width 1920; Height 1080; AvailHeight 1040; AvailWidth 1920.

Unter Windows 7: Width 1536; Height 864; AvailHeight 826; AvailHeight 1536.

Die Bildschirme beider Rechner haben die Auflösung 1920x1080 bei einer Wiedergabefrequenz von 60Hz. Die Grafiktreiber beider PCs sind aktualisiert.

Kann mit diesen Zahlen jemand etwas anfangen? Die fehlerhafte Anzeige ist unter Windows 7. Unter Windows 8 zeigt SeaMonkey 2.20 korrekt an - und hat auch hinsichtlich der Auflösung ermittelt mit der eingangs erwähnten Testseite die gleichen Zahlen wie unter Firefox 23. Unter Windows 7 nutze ich aufgrund der schlechten Erfahrungen mit Firefox 22 wieder Firefox 21 sowie zum Testen alle anderen Browser, in denen keinerlei Probleme mit der Anzeige von Webinhalten festzustellen sind.

Vielen Dank im Voraus für die Antwort!

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If I update on Windows 8 on Firefox 23 is the display in order. In order is the display in SeaMonkey 2.20 in Windows 8, which has the same user-agent such as 23 for Firefox (Mozilla/5.0 (Windows NT 6.1; WOW64; RV: 23.0) Gecko / 20100101 Firefox / 23.0 SeaMonkey/2.20). But in Windows 7, the display of SeaMonkey 2.20 is still flawed, so I must assume that the display of Firefox is still faulty 22 and 23 under Windwos 7 always. There are findings? Thank you in advance for the answer.

In addition I have noted it already somewhere else, that so far no one of the output of Web content in Internet Explorer, 11 similar display issues (2xfacher zoom as a default in the Firefox of 22 and in the SeaMonkey 2.20) had reported. This contradicts the statements made here in the Forum before (namely at the end of the total 5 pages about this issue), that the "high-DPI support" in the IE 11 as well as the chrome would create 30 similar problems. Obviously, there could solve the problem better than at Mozilla.

This site is 2.20 quite different information between the entries on Windows 7 and Windows 8 for the browser for SeaMonkey.

On Windows 8: Width 1920; Height 1080; AvailHeight 1040; AvailWidth 1920.

On Windows 7: Width 1536; Height 864; AvailHeight 826; AvailHeight 1536.

The screens of both computer have the resolution of 1920 x 1080 for a playback frequency of 60 Hz. The graphic drivers of both PCs are updated.

Can someone make these figures? The faulty display is Windows 7. Windows 8, SeaMonkey 2.20 shows correctly - and has determined with regard to the resolution the same numbers as under Firefox 23 with the aforementioned test page. In Windows 7 I use Firefox 21 due to the bad experiences with Firefox 22 again, as well as all other browsers, in which to determine any problems with the display of Web content are for testing.

Thank you in advance for the answer!

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this just indicates that you have set windows in the windows control panel > appearance > display to display at 125% on your windows 7 device and apparently to 100% on windows 8. more information about that is available at

in upcoming versions of ie and chrome those browsers will also rely on that setting when rendering web content just as firefox does now.

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Your instruction solved this problem! Thank you very much!

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