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fonts - Is there a way to customize the CSS of Firefox Reader View?


I love Firefox Reader View. But not its fonts. More specifically, these are not the best choices:


body.serif, body.serif .remove-button {
    font-family: Georgia, "Times New Roman", serif;
}

body.sans-serif, body.sans-serif .remove-button {
    font-family: Helvetica, Arial, sans-serif;
}

I'd rather have this:


body.serif, body.serif .remove-button {
    font-family: "Cambria", serif;
}

body.sans-serif, body.sans-serif .remove-button {
    font-family: "Open Sans", "Segoe UI", "Tahoma", "Calibri", sans-serif;
}

Now, I can apply these changes manually every time I open the Reader View via the developers tools. But is there a way to automate this?


I tried Stylish, but either I could code it correctly or Stylish wasn't up to the task.



Answer



In case you haven't gotten around to hunting this down yet, and/or for posterity, as of FF v60 the solution is to:



  • locate your profile folder (listed in about:support)

  • in there, create a folder called "chrome" if it doesn't already exist

  • in that folder, create a file called "userContent.css"


Then you'll need the correct CSS at-rule and you're good to go:


@-moz-document url-prefix("about:reader") {
    body.serif {
        font-family: 'Besley*' !important;
    }
}

N.B. you can also style the sidebar and its buttons, helpful to reduce contrast for dark themes:


.toolbar {
    background-color: #333 !important;
    border-right: 1px solid #444 !important;
}
.button {
    color: #ccc !important;
    background-color: #444 !important;
}

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