Logo now 2 crossed pencils

Are you talking about the browser, its icon, shortcut . . . .

Hi The solution for this issue seems to be reinstalling Firefox. If you have a problem with the Firefox icon in the Dock then try to reinstall Firefox and drag the current Firefox application to the Trash. *https://www.mozilla.org/en-US/firefox/all/#product-desktop-release *https://support.mozilla.org/en-US/kb/install-firefox-mac