This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Your connection is not secure

  • 5 replies
  • 3 have this problem
  • 1 view
  • Last reply by cor-el

more options

After adding self signed certificate Mozila is giving error "Your connection is not secure" Even its working okay in chrome. I have added the exception from the option still getting the same problem.

After adding self signed certificate Mozila is giving error "Your connection is not secure" Even its working okay in chrome. I have added the exception from the option still getting the same problem.
Attached screenshots

Chosen solution

Yes, that is correct. If you use .dev then a secure connection is enforced.

Read this answer in context 👍 0

All Replies (5)

more options

Your screenshot is telling you what is wrong.

more options

I am not able to open local site with https

Mozilla is preventing to open it

more options

Is this happening with a local connection?

You can no longer use some domains like .dev locally because its owner (Google) has added some domains to the HSTS preload list and a secure connection is automatically enforced. The ".dev" domain landed on the HSTS preload list in Firefox 59.0b7 and this means that Firefox will automatically try a secure connection to these TLDs.

A possible workaround could be to disable the HSTS preload list, but this is not recommended.

  • network.stricttransportsecurity.preloadlist = false
more options

You means I have to change the .dev domain to another in my local system for testing. Right??

more options

Chosen Solution

Yes, that is correct. If you use .dev then a secure connection is enforced.