Popup der Suchmaschinen ohne Icons

 // userChromeShadow.uc.js
// Button zum Aufruf der userChromeShadow.css im Ordner chrome

(async function() {
    if (location !== 'chrome://browser/content/browser.xhtml') return;

    try {
        // Pfad zur CSS-Datei
        let file = PathUtils.join(PathUtils.profileDir, 'chrome', 'userChromeShadow.css');

        // Datei-URI erzeugen statt Data-URI
        let fileObj = new FileUtils.File(file);
        let uri = Services.io.newFileURI(fileObj);

        let sss = Cc['@mozilla.org/content/style-sheet-service;1']
                    .getService(Ci.nsIStyleSheetService);

        // Vorherige Registrierung entfernen, falls schon vorhanden
        if (sss.sheetRegistered(uri, sss.AUTHOR_SHEET)) {
            sss.unregisterSheet(uri, sss.AUTHOR_SHEET);
        }

        sss.loadAndRegisterSheet(uri, sss.AUTHOR_SHEET);
    } catch (e) {
        console.log("UserChromeShadow-Error: " + e.name + ': ' + e.message);
    }
})();

(function() {
    if (!window.gBrowser) return;

    let btn_id = 'chromeshadow_button';

    try {
        CustomizableUI.createWidget({
            id: btn_id,
            defaultArea: CustomizableUI.AREA_NAVBAR,
            label: "Datei userChromeShadow.css",
            tooltiptext: "Datei userChromeShadow.css öffnen",
            onCreated: (this_button) => {
                this_button.style.MozContextProperties = 'fill, stroke, fill-opacity, stroke-opacity';
                this_button.style.listStyleImage = 'url("file:///C:/FoxIcons2/css22.png")';
                this_button.style.minWidth = 'fit-content';
            }
        });
    } catch (e) {}

    function click_button() {
        document.getElementById(btn_id).addEventListener('click', event => {
            if (event.button == 0) {
                let dir = Services.dirsvc.get('UChrm', Ci.nsIFile);
                dir.append('userChromeShadow.css');
                dir.launch();
            }
        });
    }

    if (window.readyState !== "loading") {
        setTimeout(click_button, 500);
    } else {
        window.addEventListener("DOMContentLoaded", click_button);
    }

    window.addEventListener('aftercustomization', () => {
        setTimeout(() => click_button(), 100);
    });
})();

//  userChromeShadow.uc.js
//  Button zum Aufruf der userChromeShadow.css im Ordner chrome

(async function() {

   if (location != 'chrome://browser/content/browser.xhtml') return;
       
    try {
          let path = PathUtils.join(PathUtils.profileDir, 'chrome', 'userChromeShadow.css');
          let cssIn = await IOUtils.readUTF8(path);

          let sss = Cc['@mozilla.org/content/style-sheet-service;1'].getService(Ci.nsIStyleSheetService);
          let uri = makeURI('data:text/css;charset=UTF=8,' + encodeURIComponent(cssIn));
          sss.loadAndRegisterSheet(uri, sss.AUTHOR_SHEET);
    
       } catch(e) { 
        
         console.log("UserChromeShadow-Error: " + e.name + ': ' + e.message );
 
       };        
   
})();

(function() {

  if (!window.gBrowser)
	return;

        let btn_id ='chromeshadow_button';

       	try {
          CustomizableUI.createWidget({
            id: btn_id,
            defaultArea: CustomizableUI.AREA_NAVBAR,
            label: "Datei userChromeShadow.css",
            tooltiptext: "Datei userChromeShadow.css öffnen",
            onCreated: (this_button) => {
                this_button.style.MozContextProperties = 'fill, stroke, fill-opacity, stroke-opacity';
                this_button.style.listStyleImage = 'url("file:///C:/FoxIcons2/css22.png")';
                this_button.style.minWidth = 'fit-content';
            }
          });
    	} catch(e) {}
		
		function click_button() {
          document.getElementById(btn_id).addEventListener('click', event => {
                if (event.button == 0) {
                    let dir = Services.dirsvc.get('UChrm', Ci.nsIFile);
                        dir.append('userChromeShadow.css');
                        dir.launch();	
                }
			});
        };

      if (window.readyState !== "loading") {
    		setTimeout(click_button, 500);
        }
      else {
    	  window.addEventListener( "DOMContentLoaded", click_button );
        };
          window.addEventListener('aftercustomization', () => {
    		setTimeout(() => click_button(), 100)
        });
})();