Better GCal 0.2.2 is an extension to add to Mozilla Firefox that, like the Better Youtube extension, aims to improve existing programs, in this case the Google calendar.
These improvements are: It allows to contract and expand the header and the side panel to increase the visual space of the calendar; color on weekends; allows to use different skins; allows long texts to be used in event titles; place handles on the top edges to hide the header, etc.
You can free download Better GCal 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.