CODEWITHSUNDEEP
firefoxwebsocket
Danger Saints
Danger Saints

Reputation: 537

How to monitor websocket frames in firefox

I know there was an extension called 'websocket-monitor', but it's no longer available.

It seems that nobody can view websocket frames by firefox.

Upvotes: 30

Views: 24524

Answers (4)

Vassilis Barzokas
Vassilis Barzokas

Reputation: 3242

That is currently not possible with the latest version of Firefox, but it has been logged and there is an open thread in Bugzilla regarding it here.

Update September 2019: According to this tweet from Mozilla, the WebSocket inspection is now working natively on the Firefox Developer edition.

Update October 2019: According to this extensive blog post from Mozilla, the feature will be released in Firefox 71. Until that, you can use Firefox Developer edition.

Update December 2019: Firefox 71 got released today and includes WebSocket inspection according to the release notes.

You can download the Firefox Developer edition from here.

Update October 2020: Sometime between Firefox 71 and Firefox 79 the "Messages" tab was removed and instead the WebSocket messages inspection was moved to the standard "Response" tab.

Upvotes: 28

Doua Beri
Doua Beri

Reputation: 10949

You can use Firefox developer edition: https://www.mozilla.org/en-US/firefox/developer

Then you open Developer tools -> Network -> Filter by Websocket -> Messages

enter image description here

Upvotes: 2

Dox
Dox

Reputation: 591

It's now possible to view/sniff WebSocket messages/frames/packets with the Nightly build of Firefox. I have never used the Firefox Nightly build before, but it seems to be working okay.

Here's a screenshot: Firefox Nightly build WebSocket messages

Upvotes: 10

T-Gergely
T-Gergely

Reputation: 492

WebSocket Sniffer seems to work with Firefox 63.

Upvotes: 7

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