FR Units support?

[aranapatona]

I was trying to do some small usercss for personal use, and seems like fr units are not supported, i am not profficient at all in CSS , so maybe the solution is just use something else. problem is I dont know how.

grid-template-columns: 89px fr1;

shows error in the editor and cant even save the script until i comment the error.

I know firemonkey uses firefox api, but i believe fr is indeed supported in the firefox api.

[erosman]

grid-template-columns example:

grid-template-columns: 100px 1fr;

The editor uses CodeMirros 5 which uses old CSS & JS linters which don't support new CSS/JS.
It should not affect saving the usercss.

There might be other errors.