#17668 disabled support for "copy to clipboard" and "go to definition" context menu items in Firefox. 

Use cases

- [x] copy to clipboard (#17740)
- [x] jump to element node (blocked by Firefox bugs [1605597](https://bugzilla.mozilla.org/show_bug.cgi?id=1605597), [1609671](https://bugzilla.mozilla.org/show_bug.cgi?id=1609671), [1609677](https://bugzilla.mozilla.org/show_bug.cgi?id=1609677))
- [x] jump to function definition (blocked by Firefox bugs [1605597](https://bugzilla.mozilla.org/show_bug.cgi?id=1605597), [1609671](https://bugzilla.mozilla.org/show_bug.cgi?id=1609671), [1609677](https://bugzilla.mozilla.org/show_bug.cgi?id=1609677))
extensionPanel => {
          extensionPanel.onShown.addListener(panel => {
            if (needsToSyncElementSelection) {
              needsToSyncElementSelection = false;
              bridge.send('syncSelectionFromNativeElementsPanel');
            }
            if (currentPanel === panel) {
              return;
            }
            currentPanel = panel;
            componentsPortalContainer = panel.container;
            if (componentsPortalContainer != null) {
              ensureInitialHTMLIsCleared(componentsPortalContainer);
              render('components');
              panel.injectStyles(cloneStyleTags);
            }
          });
          extensionPanel.onHidden.addListener(panel => {
            // 
          });
        },
      );
      chrome.devtools.panels.create(
        isChrome ? '⚛ Profiler' : 'Profiler',
        '',
        'panel.html',
        extensionPanel => {
          extensionPanel.onShown.addListener(panel => {
            if (currentPanel === panel) {
              return;