Google Chrome Extensions - Can't load local images with CSS

Question

I have a simple Chrome extension that uses the content script feature to modify a website. More specifically, the background-image of said website.

For some reason I can't seem to be able to use local images, even though they are packed in the extension.

body {     background: #000 url('image.jpg') !important;     background-repeat: repeat !important; } 

That's it, the simplest CSS... but it won't work. The browser doesn't load the image.

Answer 1

Chrome has i18n support that provides the ability to reference your extension in your CSS. I keep my images in an image folder in the extension, so reference assets in the CSS like so:

background-image:url('chrome-extension://__MSG_@@extension_id__/images/main.png'); 

Answer 2

Your image URL should look like chrome-extension://<EXTENSION_ID>/image.jpg

You would be better off replacing css through javascript. From docs:

//Code for displaying <extensionDir>/images/myimage.png: var imgURL = chrome.extension.getURL("images/myimage.png"); document.getElementById("someImage").src = imgURL;