# Kibana 5.1.1 + FF: NetworkError: Failed to load worker script at blob

**URL:** <https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340>\
**Category:** Kibana\
**Created:** [March 13, 2017, 12:47pm UTC](https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340 "2017-03-13T12:47:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![MarcelHallmann](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@MarcelHallmann](https://discuss.elastic.co/u/MarcelHallmann)\
**Post date:** [March 13, 2017, 12:47pm UTC](https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340/1 "2017-03-13T12:47:28Z")

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Hi,

I found some kind of bug with Kibana 5.1.1 and FireFox.  
When I go to "discover" and click on the small arrow to extend the found results, I'm getting the error:

> NetworkError: Failed to load worker script at blob:[https://myserver/e24df2a1-7e28-48f3-998b-258034fdbdaa](https://myserver/e24df2a1-7e28-48f3-998b-258034fdbdaa) (nsresult = 0x805e0006) (:0)

This only occurs with FireFox (version 51.0), Chrome works perfectly fine.  
I tried to set CHMOD 644 on the worker-json.js as mentioned in [Firefox fatals on discover JSON view · Issue #3610 · elastic/kibana · GitHub](https://github.com/elastic/kibana/issues/3610)  
but that didn't help.

Any suggestions?

Regards

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<div class="post-metadata">

**Author:** ![jbudz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jbudz/32/45922_2.png) [@jbudz](https://discuss.elastic.co/u/jbudz)\
**Post date:** [March 14, 2017, 1:04pm UTC](https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340/2 "2017-03-14T13:04:44Z")

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What was your Kibana installation method? Any major configuration changes from a standard install? I'll try and reproduce on my end but no luck so far.

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<div class="post-metadata">

**Author:** ![MarcelHallmann](https://avatars.discourse-cdn.com/v4/letter/m/a88e4f/32.png) [@MarcelHallmann](https://discuss.elastic.co/u/MarcelHallmann)\
**Post date:** [March 14, 2017, 2:47pm UTC](https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340/3 "2017-03-14T14:47:14Z")

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I think the problem was a wrong configuration in apache's content-security-policy headers.  
I'm gonna test it!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 11, 2017, 2:47pm UTC](https://discuss.elastic.co/t/kibana-5-1-1-ff-networkerror-failed-to-load-worker-script-at-blob/78340/4 "2017-04-11T14:47:45Z")

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