639397 - There should be an API to add browser CSS

Status: RESOLVED DUPLICATE of bug 644612

(Add-on SDK Graveyard :: General, enhancement, P3)

Description

[PaulV]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b12) Gecko/20100101 Firefox/4.0b12
Build Identifier: 

If the addon wants to modify browser chrome styling, there should be an API to load CSS into the browser process. For instance, an addon could change the background color of bookmark bar entries with "*" in their label, to give the user an easy way to make certain entries stand out with a highlight.

Reproducible: Always

Steps to Reproduce:
1. Try to load CSS

Actual Results:  
You can't

Expected Results:  
Something like:
require("css").load(require("self").data.url("my-styles.css"));

Comment 1

[Alexandre Poirot [:ochameau]]

I've proposed a new "chrome-mod" API in bug 644612.
That can propose such feature.

Comment 2

[Myk Melez [:myk] [@mykmelez]]

This might make sense as part of a mid-level API toolkit (unlike the high-level addon-kit and the low-level api-utils) for the 20% of developers who aren't satisfied by the high-level library.