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How do I enable" Transport Layer Security" in Firefox?

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  • Last reply by HuskerVSO

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In my job, I need to communicate with an organization that requires Transport Layer Security (TLS) 1.0. Is this encryption possible with Firefox?

In my job, I need to communicate with an organization that requires Transport Layer Security (TLS) 1.0. Is this encryption possible with Firefox?

All Replies (7)

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Firefox supports TLS 1.0, TLS 1.1, and TLS 1.2 "out of the box" with no changes required.

If you get an error accessing the site, could you copy/paste the explanation? In some cases, you need to click an Advanced button to see the whole reason.

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You may have to whitelist this domain.

The website may try to fallback to a lower TLS version in a way that is no longer allowed in current releases or may be using a deprecated cipher suite.

You can open the about:config page via the location/address bar and use its search bar to locate this pref:

  • security.tls.insecure_fallback_hosts

You can double-click the line to modify the pref and add the full domain () to the value of this pref. If there are already websites (domains) in this list then add a comma and the new domain (no spaces). There should only be domains separated by a comma in the Value column (example.com,www.example.com).

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First, thanks for your help! I'm attempting to communicate with a Federal agency The instructions state:

IMPORTANT: Transport Layer Security (TLS) 1.0 must be enabled in order to access the e-QIP System. If you can see a "blue" box below with "e-QIP" written in it then your Transport Layer Security (TLS) setting are sufficiently configured. Otherwise, click on "Enabling Transport Layer Security" below and follow the instructions to verify TLS settings.

========================================

The "blue box" is showing black with no copy inside...

Any advice is appreciated.

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Also, this message:

Note: If, after enabling Transport Layer Security (TLS) 1.0, your web browser still does not connect, then there may be a connection problem between your web browser and the e-QIP System. Please wait few minutes and try again. If you still have difficulties, contact the agency that sponsored your background investigation.

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This test page? https://www.opm.gov/e-qip/browser-check.asp?check

If you check the Page Info dialog, Security tab, you can see that Firefox is connecting to this site using TLS 1.2, a better quality secure connection than TLS 1.0, and if you click the "Continue to e-QIP" button Firefox still has a secure connection. Screen shots attached for reference.

Can you log in?

I'm not sure what the problem is with the black square, something is wrong with their "test".

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Okay, I see what they did wrong. Right-click the black square, expand the This Frame item on the menu, then Open Frame in New Tab. As you'll see, there's a black overlay on the page behind a popup warning about not using open wi-fi. This is covering the normal blue background that would have shown before someone added this overlay.

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Many thanks for your help!!

-D