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How can I set Firefox to always zoom in on pages automatically?

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I just got a computer that has a screen resolution of 1366 x ??? pixels. The screen is also 3 inches wider than my old computer. Anyway, websites show up much smaller than they used to on my old computer, and are hard to read because the text is small. I can zoom in and this makes the text bigger, but I have to zoom in on each individual page every time I look at a page, and this is too much work. I tried to set the default display text size, but that did not seem to work. It works on some pages but not on most of them. How can I set Firefox to always display pages zoomed in? Thanks.

I just got a computer that has a screen resolution of 1366 x ??? pixels. The screen is also 3 inches wider than my old computer. Anyway, websites show up much smaller than they used to on my old computer, and are hard to read because the text is small. I can zoom in and this makes the text bigger, but I have to zoom in on each individual page every time I look at a page, and this is too much work. I tried to set the default display text size, but that did not seem to work. It works on some pages but not on most of them. How can I set Firefox to always display pages zoomed in? Thanks.

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Chosen Solution

Try the Default Zoom Level extension: https://addons.mozilla.org/en-US/firefox/addon/6965

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(I am the poster of the question) Thanks! That helped.

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Go to 'Browser Font Settings' in Wikibooks for a description of the settings that affect what.