Browsers Keep popping phishing websites (I think)
Macperfomance is malware advertising mackeeper, so first of all keep yourself out of this soft, never install mackeeper.

In order to clean this shit your should first delete file mackeeper.plist and all other files you can't recognize as your desired software from folders /library/LaunchAgents,  /library/LaunchDaemons,  /users/%yourusername%/library/LaunchAgents

After that close all your apps and reboot your Mac