"sourceMaps is null" in Firefox Developer Edition

Question

In the debugging window of the developer console - I can see all my javascript resources listed, but in of them it just says sourceMaps is null.

The resources I'm trying to fetch are some minified jquery, and unminified, but consolidated javascript. The javascript does not contain a sourcemaps comment.

Any suggestions for how I'd resolve this?

Towroy

Same problem here with developer edition. I can't see any files in the debugger, just the message "sourceMap is null". There was no mistake before, suddenly this started. I tried the standard version (57.0b7) and nigthly (58.0a1) and it works well. – Matronna

I'm seeing this too, after disabling source maps in the DevTools settings. – Rehearse

Tanks @NickZalutskiy, you are right. I didn't expect this option to be disabled. – Matronna

Glad it helped. For posterity, here is the bug 1410590 The issue resolved itself for me, but I've seen it show up once again. – Rehearse

Answer 1

I had the same issue. I resolved it by updating the about:config settings

Open about:config

Search for devtools.source-map.client-service.enabled

The value of this option should be true.

Hooky