Firefox raster gcode Generation crashing due to "Too much recursion"

[groomit]

I'm running LaserWeb (4.0.999) on Linux.
When running raster-gcode generation on Firefox the progress bar is stuck at 100% and web-console gives:

Uncaught InternalError: too much recursion
replace xregexp.js:1679
replace xregexp.js:1274
postProcessRaster abstract-generator.js:13
postProcessing cam-gcode-raster.js:123
onmessage cam-gcode-raster.js:238

With the same image, settings, profiles and material database (imported) on chromium the gcode is generated just fine.

As I'm mainly using firefox, I'd like to see this fixed.