If you notice that the browser homepage and the search engine is changed to https://foobaroo.com/index.php?a=web&q=, then most likely it means that your browsers have been attacked by Foobaroo.com.
Slicksearch.com is fake search engine, called browser hijacker. After penetration of an Internet browser, it changes the settings of the homepage and replaces the search engine on own one. This search engine may seem normal, as it looks modern and offers familiar features for searching as Google, Yahoo or Bing but, in fact, it is annoying unwanted software, endangering the safety of your personal data.
Search.bittsearch.com is a browser hijacker, which implements on user Mac and hiddenly collects a user personal data. Also, it can change a browser homepage in Google Chrome, Safari and Mozilla Firefox and redirects every new tab to https://Search.bittsearch.com/
Search.globalsearch.pw is one of the most common type of malware - browser hijacker. This changes the browser settings without the user's consent, setting http://search.globalsearch.pw/ as the default homepage and search engine in Safari, Firefox, Chrome and other browsers installed in your system.
Squirrelfind.com is another browser hijacker, coming without the user's consent and attacking all the browsers installed on the computer. After penetration, this changes the settings of the home page and the search engine on http://squirrelfind.com/.