v152.0beta1. Script "toolbar_top_with_toggle_button-Mod.uc.js" funktioniert nicht mehr richtig.

// toolbar_top_with_toggle_button-Mod.uc.js    
// this is mod (bottom toolbar >> to >> top toolbar) of addonbar_with_toggle_button.uc.js
// Add-on Bar script for Firefox 126+ by Aris
// Have 'toggle' button
// 'toggle' toolbar with 'Ctr + /' on Windows/Linux or 'Cmd + /' on macOS
// Have 'Add-on Bar' entry in toolbar context menu
// No CSP error
// Worked in Private Window
// option: smaller buttons / reduced toolbar button height
// flexible spaces on add-on bar behave like on old Firefox versions
// [!] Fix for WebExtensions with own windows by 黒仪大螃蟹 (for 1-N scripts)
// https://github.com/Aris-t2/CustomJSforFx/blob/master/scripts/addonbar_with_toggle_button.uc.js
var compact_buttons = false; // reduced toolbar height and smaller buttons
var AddAddonbar = {
 init: function() {
    if (location != 'chrome://browser/content/browser.xhtml')
     return;
      
    /* blank tab workaround */
    try {
      if(gBrowser.selectedBrowser.getAttribute('blank')) gBrowser.selectedBrowser.removeAttribute('blank');
    } catch(e) {}
    
    try {
      Services.prefs.getDefaultBranch('browser.addonbar.').setBoolPref('enabled',true);
    } catch(e) {}
    var addonbar_label = 'Add-on Bar';
    var compact_buttons_code = '';
    var h_button_label = 'Toggle horizontal Add-on Bar'; // Toggle button name
    
    if(compact_buttons)
      compact_buttons_code = `
        #addonbar toolbarbutton .toolbarbutton-icon {
          padding: 0 !important;
          width: 16px !important;
          height: 16px !important;
        }
        #addonbar .toolbarbutton-badge-stack {
          padding: 0 !important;
          margin: 0 !important;
          width: 16px !important;
          min-width: 16px !important;
          height: 16px !important;
          min-height: 16px !important;
        }
        #addonbar toolbarbutton .toolbarbutton-badge {
          margin-top: 0px !important;
          font-size: 5pt !important;
          min-width: unset !important;
          min-height: unset !important;
          margin-inline-start: 0px !important;
          margin-inline-end: 0px !important;
        }
        #addonbar .toolbaritem-combined-buttons {
          margin-inline: 0px !important;
        }
        #addonbar toolbarbutton {
          padding: 0 !important;
        }
      `;
    // style sheet
    Components.classes['@mozilla.org/content/style-sheet-service;1'].getService(Components.interfaces.nsIStyleSheetService).loadAndRegisterSheet(
      Services.io.newURI('data:text/css;charset=utf-8,' + encodeURIComponent(`
          #addonbar toolbarpaletteitem[place=toolbar][id^=wrapper-customizableui-special-spring],
          #addonbar toolbarspring {
            -moz-box-flex: 1 !important;
            min-width: unset !important;
            width: unset !important;
            max-width: unset !important;
          }
          #main-window[customizing] #addonbar {
            outline: 1px dashed !important;
            outline-offset: -2px !important;
          }
          #addonbar {
//            border-top: 1px solid var(--sidebar-border-color,rgba(0,0,0,0.1)) !important;
            border-top: 1px solid #5D7062 !important;
            background-color: var(--toolbar-bgcolor);
            background-image: var(--toolbar-bgimage);
            -moz-window-dragging: no-drag !important;
            height: 36px;
          }
          :root[lwtheme]  #addonbar {
            background: var(--lwt-accent-color) !important;
          }
          :root[lwtheme][lwtheme-image='true'] #addonbar {
            background: var(--lwt-header-image) !important;
            background-position: 0vw 50vh !important;
          }
          #togglebutton_addonbar_h .toolbarbutton-icon { \
            list-style-image: url('chrome://browser/skin/sidebar-collapsed.svg');
            fill: #16C50C; 
            transform: rotate(90deg);
          }
          `+compact_buttons_code+`
      `), null, null),
      Components.classes['@mozilla.org/content/style-sheet-service;1'].getService(Components.interfaces.nsIStyleSheetService).AGENT_SHEET
    );
    // toolbar
    try {
      if(document.getElementById('addonbar') == null) {
        var tb_addonbar = document.createXULElement('toolbar');
        tb_addonbar.setAttribute('id','addonbar');
        tb_addonbar.setAttribute('collapsed', 'false');
        tb_addonbar.setAttribute('toolbarname', addonbar_label);
        tb_addonbar.setAttribute('defaultset','spring,spring'); 
        tb_addonbar.setAttribute('customizable','true');
        tb_addonbar.setAttribute('mode','icons');
        tb_addonbar.setAttribute('iconsize','small');
        tb_addonbar.setAttribute('context','toolbar-context-menu');
        tb_addonbar.setAttribute('lockiconsize','true');
        tb_addonbar.setAttribute('class','toolbar-primary chromeclass-toolbar browser-toolbar customization-target');
        document.getElementById('navigator-toolbox').appendChild(tb_addonbar);
        
        CustomizableUI.registerArea('addonbar', {legacy: true});
      
        CustomizableUI.registerToolbarNode(tb_addonbar);
        
        // 'Ctr + /' on Windows/Linux or 'Cmd + /' on macOS to toggle add-on bar
        var key = document.createXULElement('key');
        key.id = 'key_toggleAddonBar';
        key.setAttribute('key', '/');
        key.setAttribute('modifiers', 'accel');
        key.addEventListener("command", () => {var windows = Services.wm.getEnumerator(null);
            while (windows.hasMoreElements()) {
              var win = windows.getNext();
              var hAddonBar = win.document.getElementById('addonbar');
              setToolbarVisibility(hAddonBar, hAddonBar.collapsed);
              Services.prefs.getBranch('browser.addonbar.').setBoolPref('enabled',!hAddonBar.collapsed);
              if(!hAddonBar.collapsed)
                win.document.querySelector('#togglebutton_addonbar_h').setAttribute('checked','true');
              else win.document.querySelector('#togglebutton_addonbar_h').removeAttribute('checked');
            }} );
        document.getElementById('mainKeyset').appendChild(key);
        
        
        try {
          setToolbarVisibility(document.getElementById('addonbar'), Services.prefs.getBranch('browser.addonbar.').getBoolPref('enabled'));
        } catch(e) {}
        
        
        CustomizableUI.createWidget({
            id: 'togglebutton_addonbar_h', // button id
            defaultArea: CustomizableUI.AREA_NAVBAR,
            removable: true,
            label: h_button_label, // button title
            tooltiptext: h_button_label, // tooltip title
            onClick: function(event) {
              if(event.button==0) {
                var windows = Services.wm.getEnumerator(null);
                while (windows.hasMoreElements()) {
                  var win = windows.getNext();
                  
                  var hAddonBar = win.document.getElementById('addonbar');
                  setToolbarVisibility(hAddonBar, hAddonBar.collapsed);
                      
                  
                  Services.prefs.getBranch('browser.addonbar.').setBoolPref('enabled',!hAddonBar.collapsed);
                  
                  if(!hAddonBar.collapsed)
                    win.document.querySelector('#togglebutton_addonbar_h').setAttribute('checked','true');
                  else win.document.querySelector('#togglebutton_addonbar_h').removeAttribute('checked');
                }
              }
            },
            onCreated: function(button) {
              if(Services.prefs.getBranch('browser.addonbar.').getBoolPref('enabled'))
                button.setAttribute('checked','true');
              return button;
            }
                
        });
        
      
      }
    } catch(e) {}
 }
}
/* initialization delay workaround */
document.addEventListener('DOMContentLoaded', AddAddonbar.init(), false);
/* Use the below code instead of the one above this line, if issues occur with downloads button on add-on bar*/
/* fix for downloads button on add-on bar - thanks to dimdamin */