Today after installing Firefox 55.0 I noticed that Norton Toolbar had "Legacy" beside it. I read Mozilla's explanation of what it means. But I'm wondering if there will be an update before November 2017 when Firefox 57.0 comes out. After that NTB is supposed to stop functioning because it is using "older technology".
https://support.mozilla.org/en-US/kb/firefox-add-technology-modernizing?as=u&utm_source=inproduct
Screenshot;
