Selector not working

How to?
#1

I am unable to select any elements on the page . The small selector box does not appear on the webpage and therefore as i try to select a link it just goes to the hyperlink !

Sitemap is
https://register.fca.org.uk/s/search?sectors=Mortgage%2CInvestment%2CPensions&location=Birmingham%2C+UK&geocodes=ChIJc3FBGy2UcEgRmHnurvD-gco&type=Postalcode