remove fbclid

background.js

function remove_fbclid(details){
    let index, url = details.url, update = 0;

    index = url.indexOf('facebook.com/l.php?u=');
    if(index > -1 && index < 15){
        url = url.substring(index+21, url.indexOf('&'));

        if(url !== undefined){
            url = decodeURIComponent(url);
            update = 1;
        }
    }

    if((index = url.indexOf('?')) != -1){
        const query = url.substring(index+1);
        let parameters = query.split('&');

        for(let i = 0; i<parameters.length; i++){
            let p = parameters[i];
            if(p.indexOf('fbclid=') == 0){

                if((pos = p.indexOf('#')) != -1){
                    parameters[i] = p.substring(pos, p.length);
                } else {
                    parameters.splice(i, 1);
                }

                url = url.substring(0, index);
                update = 1;

                if(parameters.length)
                    url += '?' + parameters.join('&');

                break;
            }
        };
    }

    if(update){
       	chrome.tabs.update(details.tabId, { url: url });
    }
}

chrome.webNavigation.onBeforeNavigate.addListener(remove_fbclid);

manifest.json

{
  "manifest_version": 2,
  "name": "fbclid remove",
  "version": "0.1.4",

  "permissions": [
    "webNavigation"
  ],

  "background": {
    "scripts": ["background.js"],
    "persistent": false
  }
}