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How to change background color of a site opening in a tab

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  • Last reply by Dan

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So, whenever I click a link that will open in a new tab, the whole firefox background will flash in bright white color for a second until the page is loading. How can I change this background color?

So, whenever I click a link that will open in a new tab, the whole firefox background will flash in bright white color for a second until the page is loading. How can I change this background color?

Chosen solution

The above style rule covers the time before Firefox starts painting the default page background color (or the page's own background color). To soften that a bit you could change the default page background from pure white to light gray:

(0) Select and copy the following color value:

#F8F8F8

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste color and pause while the list is filtered

(3) Double-click the browser.display.background_color preference, delete the existing value, and paste the value for light gray

This color will show on pages that do not specify a background color, such as

https://www.jeffersonscher.com/res/jstest.php

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All Replies (4)

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It's simplest to use an add-on or custom style rule.

For example, I use this rule, which replaces the white background behind the page with a slate bluegray color:

@-moz-document url(chrome://browser/content/browser.xul) {
  browser[type="content-primary"] {background: #778899 !important}
}

To install that rule (or another custom style rule) into Firefox, you can use either:

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It doesn't work, I added "5CACEE" instead of that number (in the window where that code already was), but still white background...

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Chosen Solution

The above style rule covers the time before Firefox starts painting the default page background color (or the page's own background color). To soften that a bit you could change the default page background from pure white to light gray:

(0) Select and copy the following color value:

#F8F8F8

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste color and pause while the list is filtered

(3) Double-click the browser.display.background_color preference, delete the existing value, and paste the value for light gray

This color will show on pages that do not specify a background color, such as

https://www.jeffersonscher.com/res/jstest.php

more options

Found the bug, I had "use system color" ticked in the firefox color settings... disabled, now working as expected! :D (And following your steps!)