Remove Newtab 0.1.12 by lightningnewtab.com
Newtab 0.1.12 by lightningnewtab.com is a malicious add-on for Mozilla Firefox browsers. This extension is often installed together with some hazardous browser hijackers, such as Oursurfing, Yoursearching, Mysites123, etc. You should definitely delete the extension and related browser hijackers accompanying it.