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How do I make the font in the bookmarks sidebar larger easier to read?

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Mac running OS X Yosemite, Firefox 38.0.5. The bookmarks in the sidebar are quite small and hard for me to read.

How can I make them larger and make the font a darker color?

Mac running OS X Yosemite, Firefox 38.0.5. The bookmarks in the sidebar are quite small and hard for me to read. How can I make them larger and make the font a darker color?

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Can you attach a screenshot?

  • Use a compressed image type like PNG or JPG to save the screenshot
  • Make sure that you do not exceed the maximum size of 1 MB

Add code to the userChrome.css file below the default @namespace line.


@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

.sidebar-placesTreechildren::-moz-tree-cell-text,
#bookmarksPanel treechildren::-moz-tree-cell-text { font-size: 13pt !important; }

The customization files userChrome.css (user interface) and userContent.css (websites) are located in the chrome folder in the Firefox profile folder.

You can use this button to go to the currently used Firefox profile folder:

  • Create the chrome folder (lowercase) in the <xxxxxxxx>.default profile folder if this folder doesn't exist
  • Use a plain text editor like Notepad to create a (new) userChrome.css file in the chrome folder (file name is case sensitive)
  • Paste the code in the userChrome.css file in the editor window
  • Make sure that the userChrome.css file starts with the default @namespace line