You seem to have understood most of it, with just a small adjustment needed:

To make a change in the Styles pane (or in Sources), switch over to the Sources tab and open your modified file. Once it's open, press ctrl-s.

Next, simply right-click on the asset in the Sources list and select Save As... to save the updated file to your computer.

Please note that there is no way to modify a remote file without saving it to disk first; any changes made will only take effect upon reloading the file.

Utilizing workspaces gives you the ability to make edits to files linked to a specific local directory. However, it's important to note that serving local files is a requirement for this feature to function properly.

If you find yourself working with files that you can't easily access directly, I suggest configuring a tampering proxy tool like Burp. With a tool like this, you can quickly alter server responses and perform real-time search and replace operations such as changing

cdn.example.com/jquery-library.js

to localhost:8080/jquery-library.js in the HTML code. Once you've set up a local server (which is straightforward), you can then edit the script on your local machine!

This method is a useful way to preview modifications made on a local level against the production content, but it should not be used as a substitute for a proper testing environment.

Though challenging, it is indeed possible to achieve:

• Begin by opening the resources and right-clicking on the folder with styles\resources (remember to click "allow" when prompted below the address bar)
• Next, right-click on the specific resource and select "save as" (save it to the working directory you specified earlier)
• Then, right-click on the same resource and choose "Map to file system resource" (using the same name as in the previous step, like all.css but without any extra identifiers)
• Make changes to the styles using the dev tools.
• After making modifications, refresh the page (only to find that your changes were not applied).
• Navigate to the resources, locate your workspace folder and the corresponding resource (e.g. all.css).
• Right-click on the resource and opt for "local modifications."
• In the console that opens up, select "apply original content" and witness your styles being successfully applied =) This method may be intricate, so using a tool like Fiddler to replace resources with local files could be a better alternative.

If you're using jquery, here's a different approach you could take:

- Load the page for the first time and then set a breakpoint on line 1 in the sources tab - Reload the page, make your changes to the file, and save it (you'll notice that the page has paused at the breakpoint) - Click the play button to continue loading the page Your modifications should now be applied. Keep in mind that if you refresh the page again, these modifications will be lost.

I hope this alternative method proves useful!

After exploring Chrome's DevTools, it appears there is currently no straightforward way to achieve this task. It may be beneficial to refer to the documentation on saving and implementing local changes. The only feature that seems to endure page reloads is snippets, but it may not meet your requirements.

If a solution for this functionality becomes available in the future, I would eagerly welcome it. In the meantime, utilizing content scripts and similar methods may be the most effective approach.

My approach might not fit the traditional definition of an answer, but it's what works for me in getting as close as possible to meeting your needs.

First, I load the webpage in my browser and then save it locally by using the save as function. I make sure to save the entire page with its HTML, JavaScript, and CSS files.

If I need to make changes to the CSS, I edit the HTML file directly and link it (or them) to my development files.

After reloading the page, I can work on it according to your specifications by saving and then reloading the changes I've made.

This method does require full access to the files, and they are likely stored locally. However, I assume you wouldn't want to edit the actual web files online.

Once I've finished modifying the files, syncing my development files with the web files is a simple process.

If you're using Firefox, a great tool I recommend is Greasemonkey. It allows you to run JavaScript scripts on webpages and even change CSS dynamically. If you're new to Greasemonkey, here's a helpful guide to get started:

For Chrome users, a similar tool called Tampermonkey is available:

When working on my website, I like to use Apache in debug mode alongside Eclipse. This allows me to see changes reflected on the site immediately after saving a page.

Just a heads up, this code snippet can make use of the jQuery library (although it's not mandatory).

If you want to see the result, open your browser console.

function modifyStyles() {
  $("*").css("color", "blue"); /* Styling elements for development using CSS and JS */
  $("head").append("<script>console.log(\"restyle\")</script>"); /* Inserting JS script into header */
  var elements = document.querySelectorAll("*"); /* Selecting all elements in the document */
  var outerHTML = document.documentElement.outerHTML; /* Grabbing outer HTML of the document */
  var innerHTML = document.documentElement.innerHTML; /* Grabbing inner HTML of the document */
  return $.ajax() /* Making an AJAX request */
  .done(function(data) { /* Handling the response from the server */
    document.documentElement.innerHTML = outerHTML; /* Modifying the document with fetched data */
    console.log(data, innerHTML, outerHTML, $(elements)) /* Logging options and callbacks */
    /* $.each($(elements), function(index, value) { console.log(value) }); */
  })
};
modifyStyles();

Take a look at this link:

If you need to replace resources, the Resource Override extension is perfect for that:

• Create a rule for the URL you want to modify
• Edit the JS/CSS/etc within the extension
• Reload as necessary!

You can even add a tab to the developer tools for more convenience.