Peace Start Tabs is a browser extension which will give you calming background images when you open your homepage. But when you always get redirected to the Peace Start Tabs browser search, then a browser hijacker is causing these redirects. This browser hijacker will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back.
Peace Start Tabs is usually installed through bundled software without you knowing. Remove it immediately.