this post was submitted on 20 Jun 2023
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Firefox CSS

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Pushing the limits of the Firefox Browser through the use of CSS.

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Hello! I have changed a few websites appearance with the userContent.css, but I'd like this to only apply to normal browsing, and not to private browsing. the UserChrome instead I'd like to be applied for both normal and private browsing. Is this possible? searching the web didn't give me any useful result... thanks in advance!

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[–] [email protected] 5 points 1 year ago (1 children)

Hmm. I don't have a good solution for that. It would be trivial using an extension like Stylus though, just don't allow it to run in PB mode.

I suppose you could do all your @-moz-document matching with regexp and then using a bookmarklet to add some "mark" to the document url. Then you wouldn't need to use PB-mode at all.

So, a bookmarklet like this, when clicked, adds/removes a#pbm suffix to the current tab and loads that address to a new tab:

javascript:((loc)=>window.open(loc.endsWith("#pbm")?loc.slice(0,-4):loc+"#pbm"))(document.location.href)

Then in you userContent.css you would write your document matching like this (example is for en.wikipedia.org):

@-moz-document regexp(".*en\.wikipedia\.org.*(?<!#pbm)$"){
  body{ color: red !important; }
}

That should work but honestly if you need this then I would rather just use extension like Stylus or open those links in separate profiles even.

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