Laurent Jouanneau

@belozer by changing the max version in application.ini. But there are some issues with 53.

Hi, Thank you for investigations. I'll will add the keycode.js or perhaps I will pass the window object. There are other issues related to keyEvent. For example they also dropped...

Sorry, I don't know IPython/Selenium. I don't know what you talk about, how I should reproduce the bug. With IPython and Selenium, you add code layers that could be responsible...

First, I can't do anything. [Canvas is using to render the window into png](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawWindow). I could try to have a transparent window but I'm not sure it can be done...

no, I cannot render in an iframe. it would complexify a lot all the mecanism of the frame API (webpage.frameContent etc) and the internal network listeners... > maybe the screen...

I re-tried `rgba(0,0,0,0)` with drawWindow() + transparent background set on the XUL window etc, with Firefox 57: it does not work :-(

Hi, "override in code" is not really possible, as the version verification is done by Firefox, not Slimerjs, during the startup. However the option "earlier updates" is possible.

Did you try with a single dash [as indicated into the documentation](https://docs.slimerjs.org/current/configuration.html#command-line-options) ? `-webdriver` instead of `--webdriver`

It seems something fails with CasperJS. Is your script is complete here? If not, could you give the full source code of a minimal test case?

Thank you for your investigations! > and then joining these portions together I don't know how to "join" images. I don't think it is just a concatenation of files ;-)...