extruder doesn’t work on web version of sketchup?
What are you referring to? Push/Pull? Or maybe Follow Me? If so, they do work in the web version. It may be that you have the face inside a group or component or it might be that you have more than one face in the selection. Share the .skp file with us so we can see what you are working with.
Which version of SketchUp for web are you using? Are you still working on Mac Yosemite with an ancient nVidia 9400 graphics card?
Push/Pull working.

FollowMe working.
