Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Sometimes Firefox uses HTTPS and sometimes not.

Why does that happen, is that caused by Firefox or by websites that I visit?

share|improve this question
up vote 1 down vote accepted

The answer is that HTTPS is for Secure interaction between client (the browser) and server (site) but it requires additional computer (client and server's) resources to work. Therefore, sites don't use HTTPS everywhere.

ALso, since HTTPS uses, so called, Certificates which are not free to use (they could create their own Certificates though for free, but browsers would complain that it's issued by Untrusted source). Sites use HTTPS only in critical pages like Login pages, shops etc.

In your case it is actually not the browser issue it is rather site configurations.

However, possibly, FireFox detects two versions of sites (http and https) and prefers HTTPS over HTTP.

share|improve this answer
1  
thank you that was informative. – major Dec 20 '11 at 5:21
    
Some sites offer an optional HTTPS version. If you want to make the encrypted Google search your Firefox default engine, for example, use this: addons.mozilla.org/en-US/firefox/addon/google-ssl-search – user33758 Dec 20 '11 at 5:32

HTTPS is used for secure connection between server and client and data on this connection is sent encrypted so eavesdropping is not possible. HTTPS require Certificates and trusted certificates are expensive (not much though). So not every site has this. It is generally used while sensitive data is to be sent over network, say credit card details, or login information etc. So for those hosts, which has HTTPS connections available, HTTPS connection is used.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .