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Why are new tabs opening in 200% zoom?

New User

Why are new tabs opening in 200% zoom?

I am using version 22.0. Firefox updated itself a week or so ago and ever since then, when Firefox opens up (with my saved tabs) or when I click to open new tabs, all websites open in 200% zoom. I have to hit Control - twice to get to the "normal" zoom view every single time.

Also, my left-hand side Bookmarks menu looks different too - they look like they are also zoomed in but I can't figure out how to zoom out of that area so that I can see all my bookmarks like I used to.

None of my other programs are having any kind of zoom issue so I know it's related only to Firefox. I have rebooted many times over the past week or two and that doesn't solve the issue.

I've also tried going to View / Zoom / Reset - but that takes me BACK to the 200% view.


Site Moderator

Re: Why are new tabs opening in 200% zoom?

You can set the layout.css.devPixelsPerPx pref on the about:config page to 1.0 (current default value is -1.0) to restore the behavior of previous Firefox versions.

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

You can look at the Default FullZoom Level or NoScript extension if web pages need to be adjusted after changing the layout.css.devPixelsPerPx pref.

Grand Master

Re: Why are new tabs opening in 200% zoom?

Hello, Have you tried Firefox's zoom feature? This will help increase the size of web pages.

  • To make things bigger, press Ctrl and + at the same time.
  • To make things smaller, press Ctrl and - at the same time.
  • To reset the size back to normal, press Ctrl and 0 at the same time.

You can also use the NoSquint. add-on to change the default zoom level for all websites at once. After setting your global zoom level, you can still fine-tune the zoom on individual sites.

Using NoSquint:

  1. After installing NoSquint, make sure you have the Add-on Bar displayed:
    • Right-click the new tab button ("+") or a blank area of the tab bar to the right of it and choose Add-on Bar from the shortcut menu.
  2. Click the % on the Add-on Bar to call up site preferences, then click the Global Settings button, then the Zooming tab.
    • You can experiment with sizes larger than 125%, but it's not recommended that you go higher than 150% unless you have a large high-resolution monitor.

If there are particular sites that still present a problem, feel free to post their URLs.

Please let us know if this helped you!

Thank you.