Chrome extension inject css.
Chrome and Firefox extension to inject CSS files.
Chrome extension inject css Perfect for rapid prototyping, debugging, and personalizing your web experience. Chrome and Firefox extension to inject CSS files. scripting API, declare the "scripting" permission in the manifest plus the host permissions for the pages to inject scripts into. com Nov 7, 2025 · The path of CSS files to inject relative to the extension's root directory. Dec 17, 2024 · Inject custom CSS into any websiteInject custom CSS into any website An extension to inject custom CSS into any site you want and have it be saved. It works when I reference the files in "content_scripts", but I need to be able to add/remove the files at runtime without refreshing the page, so it won't work for me. Currently available on Google Chrome and Microsoft Edge. The changes you make are applied every time you visit the specified website(s). While static CSS files are the go-to for styling, there are scenarios where **dynamic CSS injection**—using a JavaScript-generated string—offers greater flexibility. frameId Optional integer. Once you start editing CSS on a page, you get a permission prompt specific to that domain. 8 ( 635 ratings ) Share Extension Developer Tools 200,000 users Is there any way to fix this? Or, maybe, some other way to inject a CSS from that JavaScript file? Note: I can't include style sheet directly from manifest. So, I could just define what pages said CSS file would Description CSS Injector Extension allows you to inject custom CSS into specific websites and manage them through a simple UI. Either files or css must be specified. Inject HTML, CSS or JavaScript into any web-page. matchAboutBlank Optional Mar 27, 2011 · I was wondering if it was possible to add CSS to pages through a CSS file, similarly to adding JS to pages through a JS file (contentscript). Nov 6, 2025 · Chrome extensions empower developers to customize and enhance web experiences, from adding new features to modifying page appearance. The extension also works with LiveReload so you can work on the CSS without having to reload About Browser Extension that can automatically inject custom HTML, CSS or JavaScript into any web-page. This way you can customize any web-page to fit your needs. Overview Very simple chrome extension to inject CSS into websites * synced between devices * no ads * no tracking * open source Keep multiple stylesheets ready to inject and change on the fly! This extension allows you inject an external CSS stylesheet into a page via URL. Contribute to nelsonr/super-css-inject development by creating an account on GitHub. css". origin Optional string. Later, if the CSS for a domain is not used, the permission will be dropped. The extension does not require permissions to access all data on all websites all the time. Minimal and secure way to add custom CSS per-domain Add custom CSS styles on websites. The frame where the CSS should be injected. There is no UI clutter of any kind. The following example uses the activeTab permission. The extension allows you to keep an list of multiple CSS stylesheets ready to inject so it's easier to toggle between them when working in multiple projects. The best part of this extension is that it has minimal permissions, which reduces the risk of this being malware or being used in a trojan horse attack. Chrome Extension that allows injection of any hosted CSS file into a webpage - sym3tri/CSS-Inject Mar 3, 2025 · If you’re looking for the best Chrome extension to insert scripts into webpages, Requestly is the top choice. I'm trying to link CSS files to a page with a Chrome extension. Defaults to 0 (the top-level frame). Basically other Aug 11, 2025 · Manifest To use the chrome. Use the "host_permissions" key or the "activeTab" permission, which grants temporary host permissions. . Defaults to AUTHOR. Try it out and streamline your workflow today! Nov 7, 2025 · In Chrome, these URLs are resolved relative to the extension's base URL. See full list on github. The style origin for the injection, either USER, to add the CSS as a user stylesheet, or AUTHOR, to add it as an author stylesheet. The CSS will persist across sessions and your preferences will be saved. It not only allows seamless JavaScript and CSS injection but also offers advanced features like rule-based execution, API response modification, and cloud sync, making it ideal for developers and testers. This property is case-insensitive from Firefox 144. User JavaScript and CSS Add to Chrome 4. The entire About CSS Injector Extension allows you to inject custom CSS into specific websites and manage them through a simple UI. Sep 14, 2025 · A Chrome extension that allows developers to dynamically inject, manage, and toggle custom CSS styles on any webpage. To work cross-browser, you can specify the path as an absolute URL, starting at the extension's root, like this: "/path/to/stylesheet. mvjpcghjwwezpxoajhpyubcyeqqepmekntdclqprrpofgndvcoswqibkcybzoxsgdgojkkuxruwdv