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How can I increase the size of the letters in my web pages and e-mai in firefox?l in firefoc

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I saw something about changing the font size of e-mails that I'm writing, but I want to change the font of all the pages that I want to read. Thanks

I saw something about changing the font size of e-mails that I'm writing, but I want to change the font of all the pages that I want to read. Thanks

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The Firefox Page Zoom feature does a domain by domain level of saving the users preferred zoom level settings, there is no default Page Zoom level setting in Firefox, as with some other browsers.

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

Or the NoSquint extension:
https://addons.mozilla.org/en-US/firefox/addon/2592/