As long as your web server sets the correct Content-Encoding HTTP header, it should work in all browsers that support SVG.
The only error that I know of is that you want to open svgz files from a local drive (i.e.: without using a web server). This does not work in all browsers.
In addition, if your svg files are large, then you should consider pre-processing them using SVG Scour or similar. It is quite common to see vector graphics editors such as Illustrator and Inkscape display redundant data in files (binary drops or custom xml markup).
source share