Can alternate Android browsers (such as Firefox) use features not supported by an older default browser?
I frequently use http://caniuse.com for quick web browser support reference on particular HTML/CSS element. There is "Android Browser" column with a note that reads: Android browser/WebView ...
I have used the Google Developer PageSpeed Test and it suggests this: Improve server response time Suggestions for this page Long web server response times delay page loading. Reduce your response ...