Hello, I tried pasting that into the URL bar But firefox autoremoves the "javascript:" in front. When I type it manually still, it does nothing.

So I pressed F12, went to console tab and pasted it there

It fails with "Uncaught (in promise) ReferenceError: PlacesUtils is not defined"

Here is a human readable version of this command

I'm just trying to create a bookmark with a script, so I can create the 40 or so special bookmarks with search keywords that I want, without wiping all the bookmarks like an import would. Also I want to just automate this for my OS re-installation.

javascript:(async () => {
    // Define variables for bookmark details
    let folderTitle = "S"; // The name of the folder where the bookmark will be stored
    let bookmarkTitle = "GPT Classic"; // The title of the bookmark
    let bookmarkURL = "https://chatgpt.com/g/g-YyyyMT9XH-chatgpt-classic/?q=%25s"; // URL of the bookmark, %25s is the URL-encoded version of %s
    let keyword = "cc"; // The keyword to access the bookmark directly from the address bar

    // Find or create the folder in the Bookmarks Toolbar
    let folderGuid = (await PlacesUtils.bookmarks.search({
        parentGuid: PlacesUtils.bookmarks.toolbarGuid, // Look in the Bookmarks Toolbar
        title: folderTitle // Look for the folder with the given title
    }))[0]?.guid; // If the folder is found, get its GUID

    if (!folderGuid) {
        // If the folder doesn't exist, create it
        folderGuid = (await PlacesUtils.bookmarks.insert({
            parentGuid: PlacesUtils.bookmarks.toolbarGuid, // Add it to the Bookmarks Toolbar
            title: folderTitle, // Use the specified folder title
            type: PlacesUtils.bookmarks.TYPE_FOLDER // Specify that it's a folder
        })).guid;
    }

    // Add the new bookmark to the folder
    await PlacesUtils.bookmarks.insert({
        parentGuid: folderGuid, // Add the bookmark inside the created folder
        title: bookmarkTitle, // Use the specified bookmark title
        url: bookmarkURL // Use the specified bookmark URL
    });

    // Add a keyword to the bookmark for quick access
    await PlacesUtils.keywords.insert({
        keyword: keyword, // The keyword that can be used in the address bar
        url: bookmarkURL // The URL associated with the keyword
    });

    // Notify the user that the bookmark and keyword were added successfully
    alert(`Bookmark "${bookmarkTitle}" added to folder "${folderTitle}" with keyword "${keyword}"!`);
})();