Right-click in the URL bar.
                            Click on 'Edit search engines...' when the context menu appears.
                            Click the 'ADD' button in the bottom right-hand corner.
                            
                                    Enter the following details:
                                    
Search engine: SiteSearchr.com
                                    
Keyword: *
                                    
URL with %s in place of query: https://sitesearchr.com/search?q=%s
                                
                            Scroll through the list of search engines until you find our listing for SiteSearchr.com, then click 'Make default'.