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how can I change the size of the text and icons in the tool bars

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text and icon sizes in the menu and bookmark toolbars is to small to read comfortably. I would like to change size.

text and icon sizes in the menu and bookmark toolbars is to small to read comfortably. I would like to change size.

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You can look at this extension to adjust the font size in the user interface.

You can set a global Zoom that affects both the user interface and web pages (this modifies the layout.css.devPixelsPerPx pref). You can do this via the Options/Preferences of the extension (about:addons or the Tools menu).

You can look at the Default FullZoom Level or NoSquint extension to set a default font size and page zoom on web pages.