Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Just upgraded to new version and now shrink to fit no longer works, what is the fix?

  • 5 replies
  • 5 have this problem
  • 15 views
  • Last reply by rbosborne

more options

after upgrading to newest release the shrink to fix screen width no longer works. What is the fix?

after upgrading to newest release the shrink to fix screen width no longer works. What is the fix?

Chosen solution

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).
  • You can use values between 0.05 and 1.0 to reduce elements in size or use values greater than 1.0 to magnify and make elements larger (percentage divided by DPI, % / DPI).

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

See also this MozillaZine forum thread: Does Fx 22 nightly look too large?

Read this answer in context 👍 1

All Replies (5)

more options

Shrink to fit for printing?

Or is this a problem with zoom?

Firefox 22 now detects your Windows font size setting (e.g., 125% for larger fonts) and DPI settings and adjusts its own display accordingly. This may cause some sites to be "overzoomed".

Could you describe what you're seeing in more detail?

more options

ZOOM OUT will fix the current screen, but each new screen must be adjusted individually. Looking for a overall fix.

more options

Chosen Solution

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).
  • You can use values between 0.05 and 1.0 to reduce elements in size or use values greater than 1.0 to magnify and make elements larger (percentage divided by DPI, % / DPI).

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

See also this MozillaZine forum thread: Does Fx 22 nightly look too large?

more options

To adjust the setting cor-el is describing, you would use the about:config preferences editor.

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the filter box, type or paste pix and pause while the list is filtered.

Is yours current set to the default value of -1.0? If it's bold, it has already been customized and as the first step, you might try a right-click > Reset to see how that looks.

more options

Default Full Zoom appears to have fixed the problem.

thank you