browser shows https on twitter
1. Which operating system are you using?
2. If you are using internet explorer, which version of internet explorer are you using?
I would suggest you to follow the link if you are using internet explorer and check.
Fix your hijacked web browserHow to optimize Internet Explorer
Disclaimer: The Reset Internet Explorer Settings feature might reset security settings or privacy settings that you added to the list of Trusted Sites. The Reset Internet Explorer Settings feature might also reset parental control settings. We recommend that you note these sites before you use the Reset Internet Explorer Settings feature