hello and welcome to justanswer, My name is ***** ***** i will be assisting you today,
I'm sorry about the issue, first try to find the software on control panel, please Click Start, Control Panel, Add / Remove Programs, Pelikan Search related application > Remove/Uninstall, If it is not listed please Click Start again, click Computer and go to your C Drive then Program Files and delete Pelikan Search related item.
Note: please enable "show hiden files and folders" : https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/win_fcab_show_file_extensions.mspx
Once you delete this, open your firefox browser, click on Tools and go to Add-ons, Extensions and remove Pelikan Search hijacker related plug-in, now reopen firefox go to Options, remove the hijacker from homepage list if it is there.
Restart your computer and check, if the problem persists, please follow these steps :
Run a full scan using your antivirus software, Next you want to run Malwarebytes, a free malware/virus scanner.
Please click https://www.malwarebytes.org/mwb-download Once you install it, Please Update and then run a Quick Scan and Delete any Malware/Viruses.
Reset firefox by : https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings
let me know if you need further help