JMeter "Content encoding Error" when using FireFox and HTTP(S) Test Script recorder

Question

I am trying to configure Mozilla Firefox for JMeter 5 and as I am setting up manual proxy in Firefox and same proxy number in JMeter.

I installed the special certificate. My Firefox is showing error as "Content encoding Error", when I open https://www.google.com website.

Answer 1

This is due to Brotli Encoding not being supported by JMeter Test Script Recorder in versions <= 5.0.

See:

• https://bz.apache.org/bugzilla/show_bug.cgi?id=62842

The bug is now fixed in nightly build and in upcoming 5.1 version of JMeter.

To workaround, in Firefox, type about:config and input Content-Encoding:

Then remove br from the algorithms accepted.