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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox loads https://cdn.jsdelivr.net/npm/vue/dist/vue.js once, but not a second time

simonecesano
simonecesano
more options

A web app I am building seems to be broken in Firefox. It loads ok the first time, but not the second.

I checked the console and I found I get an error message that says:

Loading failed for the <script> with source “https://cdn.jsdelivr.net/npm/vue/dist/vue.js”.

I tried loading the URL https://cdn.jsdelivr.net/npm/vue/dist/vue.js in another tab, and it loads ok the first time, but if I reload it I get a security error:

Did Not Connect: Potential Security Issue

and when I hit advanced I see

Someone could be trying to impersonate the site and you should not continue. [...] Error code: SEC_ERROR_UNKNOWN_ISSUER

and under view certificate:

https://cdn.jsdelivr.net/npm/vue/dist/vue.js Peer’s Certificate issuer is not recognized.

Neither Chrome nor Safari seem to be affected.

Another weird symptom is that pictures on stackoverflow are all broken.

I appreciate any help - thanks.

A web app I am building seems to be broken in Firefox. It loads ok the first time, but not the second. I checked the console and I found I get an error message that says: Loading failed for the <script> with source “https://cdn.jsdelivr.net/npm/vue/dist/vue.js”. I tried loading the URL https://cdn.jsdelivr.net/npm/vue/dist/vue.js in another tab, and it loads ok the first time, but if I reload it I get a security error: Did Not Connect: Potential Security Issue and when I hit advanced I see Someone could be trying to impersonate the site and you should not continue. [...] Error code: SEC_ERROR_UNKNOWN_ISSUER and under view certificate: https://cdn.jsdelivr.net/npm/vue/dist/vue.js Peer’s Certificate issuer is not recognized. Neither Chrome nor Safari seem to be affected. Another weird symptom is that pictures on stackoverflow are all broken. I appreciate any help - thanks.

Chosen solution

Self answer: this is an enterprise laptop. It seems there is some kind of opendns blocking going on.

The solution is to set security.enterprise_roots.enabled to true (via about:config) to configure Firefox to use OS Keychain for trusted root certificates store.

Found here: https://superuser.com/questions/621694/deploy-root-certificate-to-firefox-on-mac-os-x

Read this answer in context 👍 1

All Replies (2)

simonecesano
simonecesano Question owner
more options

Chosen Solution

Self answer: this is an enterprise laptop. It seems there is some kind of opendns blocking going on.

The solution is to set security.enterprise_roots.enabled to true (via about:config) to configure Firefox to use OS Keychain for trusted root certificates store.

Found here: https://superuser.com/questions/621694/deploy-root-certificate-to-firefox-on-mac-os-x

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

The Cisco Umbrella Root CA signing certificate also can be installed directly into Firefox if desired, but in managed deployments, the option you used probably will be the more common one.

https://docs.umbrella.com/deployment-umbrella/docs/install-cisco-umbrella-root-certificate#firefox