CODEWITHSUNDEEP
javascriptfirefoxbrowser
auramo
auramo

Reputation: 13357

Browser TypeError “fsGetSearchListener is not a function” on FireFox

We recently went live with a website. I set up an onerror event handler in the client-side Javascript-code to see what kind of errors users are getting (if any). The handler sends the error message and user agent string to my server log. I haven't got a lot of errors at all, but there is one which is pretty mysterious to me. It and occurs at least with Firefox versions 43 and 44 (Windows NT 6.3 - 10.0). Haven't been able to repeat it myself, and the error occurs when the browser enters my site with a gclid parameter (from adwords).

This is the error-message:

"TypeError: fsGetSearchListener(...) is not a function"

I get about 5 of these every day.

Example of an user agent string with this issue: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0

What's really weird about this is that googling fsGetSearchListener doesn't give any results.

Any ideas?

Upvotes: 2

Views: 171

Answers (1)

Todd H. Gardner
Todd H. Gardner

Reputation: 630

We've started detecting these errors across a few different customer sites with with TrackJS It appears to be an error in a Firefox extension, however we have not been able to identify which one.

The errors appear to come from a <script> tag embedded on the page itself. Our theory is that some extension is doing a document.write and including custom script, which is breaking.

Upvotes: 1

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