[Tip] Edit The Firefox Maximum And Minimum Zoom Levels

January 28th, 2011 | 2 Comments | Posted in How To by bharath

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Readability level is one of the important aspect the modern day browsers stress upon. Different users need different readability levels for various elements on a webpage. The browsers let users to zoom in or zoom out of any webpage and adjusting them according to their comfort. Hence all the browsers including the Internet Explorer, Mozilla Firefox, Google Chrome, Opera etc. have incorporated the settings for adjusting zoom levels into the menu settings making them easily accessible. Firefox zoom levels range from a maximum zoom in level of 300% to a minimum zoom out level of 30%. While these are satisfactory for most users, there would still be some users who want to zoom in a page for more than 300% in order to see a particular element of a page like text, image or vide to more precisely, at which they feel comfortable reading it. Some people like web developers would want to zoom out to a level more than 30% to just see how all the elements in a web page are fitting into the screen. Whatever may be the reason, you need to have a choice. Internet Explorer allows you to enter a custom zoom level as you can see in the following screenshot:

Internet Explorer zoom levels

You can edit the Firefox default zoom levels via the about:config settings. Follow the steps to configure your Firefox.

1. Type about:config in the Firefox address bar and hit Enter.

About:config in the Firefox address bar

2. Accept the warning and continue.

Firefox this might void your warranty alert

3. Now search for “zoom.maxPercent’ and “zoom.minPercent”. Both of these should appear as soon as you enter “zoom.m” as search string.

Max and min zoom level settings in Firefox

4. Double-click on each item to change the default values. For instance, you can change the maximum zoom percent to 500 from the default value of 300 p.c. Similarly you can edit the default value for minimum zoom out level as well.

Changing Firefox zoom levels

Click OK when you are done. Restart your Firefox for the changes to take effect.

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2 Responses to “[Tip] Edit The Firefox Maximum And Minimum Zoom Levels”

  1. virtu Says:

    Does not seem to work for Firefox 4.  Increasing maxPercent has no effect for me, the zoom still has the same limit.  Not sure if this is a bug or not.

  2. Salat3 Says:

    @virtus Change toolkit.zoomManager.zoomValues appropriate values. Does not work without this.

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