I cannot comment on the browser issue because I don't have Chrome installed, but I can confirm the scaling issue with symbols. The file 100mmSq_CM_scale_1 is too small when used as a symbol.
- confirmed on Windows 10, Inkscape 0.92.1 r15371
- confirmed on Windows 10, Inkscape 0.92+devel 15592
I cannot comment on the browser issue because I don't have Chrome installed, but I can confirm the scaling issue with symbols. The file 100mmSq_CM_scale_1 is too small when used as a symbol.
- confirmed on Windows 10, Inkscape 0.92.1 r15371
- confirmed on Windows 10, Inkscape 0.92+devel 15592