#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))
chrome.devtools.inspectedWindow.eval(
          '(window.__REACT_DEVTOOLS_GLOBAL_HOOK__.$0 !== $0) ?' +
            '(window.__REACT_DEVTOOLS_GLOBAL_HOOK__.$0 = $0, true) :' +
            'false',
          (didSelectionChange, evalError) => {
            if (evalError) {
              console.error(evalError);
            } else if (didSelectionChange) {
              
              needsToSyncElementSelection = true;
            }
          },
        );
      }
      setReactSelectionFromBrowser();
      chrome.devtools.panels.elements.onSelectionChanged.addListener(() => {
        setReactSelectionFromBrowser();
      });
      let currentPanel = null;
      let needsToSyncElementSelection = false;
      chrome.devtools.panels.create(
        isChrome ? '⚛ Components' : 'Components',
        '',
        'panel.html',