browser: add browser based test

[mmatczuk]

This test allows to generate real load coming from a browser. At the moment it only supports FireFox but can be easily extended with other browsers.

[mmatczuk]

I move that and local to testing. The e2e tests I left in the root. It feels like testing is all the manual inspection tools should go.

[Choraden]

@mmatczuk this is super cool!

Unfortunately, the script won't end for me. All browsers are long gone, forwarder does not have any open connections, yet the process lives on:

make                                                                                    
pip install -r requirements.txt
Requirement already satisfied: greenlet==3.0.0 in ./venv/lib/python3.11/site-packages (from -r requirements.txt (line 1)) (3.0.0)
Requirement already satisfied: playwright==1.39.0 in ./venv/lib/python3.11/site-packages (from -r requirements.txt (line 2)) (1.39.0)
Requirement already satisfied: pyee==11.0.1 in ./venv/lib/python3.11/site-packages (from -r requirements.txt (line 3)) (11.0.1)
Requirement already satisfied: typing_extensions==4.8.0 in ./venv/lib/python3.11/site-packages (from -r requirements.txt (line 4)) (4.8.0)
playwright install Firefox

[mmatczuk]

It turns its silently fails on exception and hangs.
I added bunch of improvements, PTAL @Choraden.

[mmatczuk]

Nah it's still not good, I think I'd rewrite it in sync mode.

[mmatczuk]

@Choraden PTAL

[Choraden]

Foxnews and wsj time out waiting, however in the browser it looks ok. I don't know if this has something to do with forwarder or the testing tool itself. I don't see any disturbing logs in forwarder though.

[Choraden]

LGTM, good job @mmatczuk

[mmatczuk]

Maybe they should be "talkative"

[Choraden]

Maybe they should be "talkative"

It did help me with wsj. Foxnews still times out.