Is it possible to modify a website's CSS permanently using just the browser?

Is there a way to make changes to CSS in a large project using Firefox's built-in developer tools and have them saved permanently? I've been trying to edit the style sheets, but couldn't locate the specific property I needed. Since I can't find which file contains this property, I'm wondering if there is a way to make permanent CSS changes directly from the browser.


EDIT:-

Answer №1

Setting up in Chrome is a breeze. Begin by adding your project file to a "Workspace". Simply open dev tools with Ctrl+Shift+I, click on the settings gear, and locate the Workspace option on the left.

Once you've added your Project folder to a workspace, close out of the options and head to the "Sources" tab within dev tools.

Now, load your index.html from LocalHost as usual. In the sources panel, you'll find the currently loaded page along with its resources. Right-click on your .css file, select "Map To File System Resource", and use the search box to link it to the corresponding .css file in your project folder (now part of a workspace in Chrome). This will automatically connect any other CSS and HTML files in your Project Folder.

You can now make changes in the Elements tab within Chrome Dev Tools and they will persist. The Elements tab also provides information on which css file and line each style originates from!

A major advantage of this setup is that if you're using Sass or Less, Chrome will map your Scss files back to the processed CSS styles. Just remember to enable CSS source maps when working with Sass and Less.

Answer №2

If manually making changes is not your thing, you're in luck! There's a handy plugin for Firefox called Stylish that lets you create custom style tweaks based on rules.


UPDATE

I bring this up because it allows you to share a set of style modifications with any Firefox user who can then easily apply them to their browser. Since altering the content of remote style information permanently is not possible, the best option is to make temporary adjustments on a per-user basis whenever necessary.

Answer №3

To address this issue, the Web Developer Toolbar can be utilized. Access the CSS menu and navigate to 'Edit CSS' where modifications can be made and saved. This tool also aids in identifying relevant files for manual modification. Another option is to explore the Firebug extension which offers similar functionalities. Links to both resources are provided below:

https://addons.mozilla.org/firefirefox/addon/web-developer/

https://addons.mozilla.org/firefox/addon/firebug/

If Firebug is already installed, consider adding cssUpdater to streamline the process of saving changes.

https://addons.mozilla.org/firefox/addon/cssupdater/

Answer №4

For tips on customization, check out userContent.css:

http://www-example.mozilla.org/unix/lighting.html#usercontentcss

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