Is there a way to make Firefox ignore invalid ssl-certificates?

Mo_1870 0
Viewed 288264

I am maintaining a few web applications. The development and qa environments use invalid/outdated ssl-certificates.

Although it is generally a good thing, that Firefox makes me click like a dozen times to accept the certificate, this is pretty annoying.

Is there a configuration-parameter to make Firefox (and possibly IE too) accept any ssl-certificate?

EDIT: I have accepted the solution, that worked. But thanks to all the people that have advised to use self-signed certificates. I am totally aware, that the accepted solution leaves me with a gaping security hole. Nonetheless I am to lazy to change the certificate for all the applications and all the environments...

But I also advice anybody strongly to leave validation enabled!

firefox ssl-certificate ssl debugging
10 Answers

Try Add Exception: FireFox -> Tools -> Advanced -> View Certificates -> Servers -> Add Exception.

user_2482280

Go to Tools > Options > Advanced "Tab"(?) > Encryption Tab

Click the "Validation" button, and uncheck the checkbox for checking validity

Be advised though that this is pretty unsecure as it leaves you wide open to accept any invalid certificate. I'd only do this if using the browser on an Intranet where the validity of the cert isn't a concern to you, or you aren't concerned in general.

Dan_3920

Instead of using invalid/outdated SSL certificates, why not use self-signed SSL certificates? Then you can add an exception in Firefox for just that site.

Forgotten_Semicolon_19600

Using a free certificate is a better idea if your developers use Firefox 3. Firefox 3 complains loudly about self-signed certificates, and it is a major annoyance.

rudle_4004270

In the current Firefox browser (v. 99.0.1) I was getting this error when looking at Web Developer Tools \ Network tab:

MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT

enter image description here

I was trying to debug an Angular app which is served at https://localhost:4200... however the real port it's pointing to and being debugged from in Visual Studio 2022 is 44322.

I had to follow these steps to fix the issue:

  1. Open Firefox Settings;

  2. Look for Privacy & Security tab on the left;

  3. Scroll down to the bottom and look for Certificates;

  4. View Certificates;

  5. In this window you must click Add Exception and enter the location. In my case it was:

    https://localhost:44322

  6. Click Get Certificate button;

  7. Click Confirm Security Exception button.

After that, try reloading your page.

enter image description here

user_1140290
Admin1

The MitM Me addon will do this - but I think self-signed certificates is probably a better solution.

palmsey_5210
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