You can set the layout.css.devPixelsPerPx pref on the <b>about:config</b> page to 1.0 (current default value is -1.0) to restore the behavior of previous Firefox versions. *http://kb.mozillazine.org/about:config You can make further adjustments and start with a value of 1.0 and adjust this value with 0.1 steps or 0.05 for finer adjustments to make icons on the toolbars look right. *Use values between 1.0 and about 0.5 to reduce elements in size (do NOT go all the way to 0.05!) *Use values greater than 1.0 to magnify and make elements larger (percentage divided by DPI, % / DPI). If web pages need to be adjusted after changing this pref then you can look at the Default FullZoom Level or NoSquint extension. *Default FullZoom Level: https://addons.mozilla.org/firefox/addon/default-fullzoom-level/ *NoSquint: https://addons.mozilla.org/firefox/addon/nosquint/ Use this extension to adjust the font size for the user interface: *Theme Font & Size Changer: https://addons.mozilla.org/firefox/addon/theme-font-size-changer/ --- *https://support.mozilla.org/kb/forum-response-Zoom-feature-on-Firefox-22

对不起，我看得不是很明白，因为我的英文很差，就会个别的词汇。谢谢你的帮助。