#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))
if (evalError) {
              console.error(evalError);
            }
          },
        );
        const viewAttributeSourceFunction = (id, path) => {
          const rendererID = store.getRendererIDForElement(id);
          if (rendererID != null) {
            
            
            bridge.send('viewAttributeSource', {id, path, rendererID});
            setTimeout(() => {
              
              
              chrome.devtools.inspectedWindow.eval(`
                if (window.$attribute != null) {
                  inspect(window.$attribute);
                }
              `);
            }, 100);
          }
        };
        const viewElementSourceFunction = id => {
          const rendererID = store.getRendererIDForElement(id);
          if (rendererID != null) {
            
            
            bridge.send('viewElementSource', {id, rendererID});
            setTimeout(() => {