OverviewPageSpeedInsightsBrowser ExtensionsChromeFirefoxRulesAvoid Bad RequestsAvoid CSS @importAvoid CSS ExpressionsMinimize document.writeCombine External CSSCombine External JavaScriptCombine Image Using CSS SpriteDefer Loading of JavaScriptDefer Parsing of JavaScriptEnable CompressionLeverage Browser CachingLeverage Proxy CachingMake Landing Page Redirects CacheableMinify CSSMinify HTMLMinigy