; We had developed web client for a long time but we didn't use it from FF 3.x as it was slower than other browsers such as chrome. How much improvement did you make after that?
In June 30, 2013, [Tom's hardware reports Firefox stands out from comparison between modern browsers. With no shortpoint and wins for start-up time and reliability testing. - http://www.tomshardware.com/reviews/chrome-27-firefox-21-opera-next,3534-12.html Tom's hardware reports Firefox stands out] from comparison between modern browsers. With no shortpoint and wins for start-up time and reliability testing.
Desktop Firefox have greatly improved since 3.x. There is no sigifigent speed differences between browsers anymore as of 2013. For JS performance benchmark on browser, the latest result can be found on - http://arewefastyet.com/
; We're concerned about the performance due to low hardware spec when we proceed with big projects even though we optimized the resources such as js, html, css and images. What are your countermeasures for bad performance?
Any web-based app can be used on Firefox OS device even its not in the app store (Marketplace).
[https://marketplace.firefox.com/ Marketplace] is available for Firefox OS/Android mobile phone and desktop. : There are 18 categories of apps right now. LOQUI is one of messenger app on marketplace, [https://marketplace.firefox.com/app/loqui?src=searchLOQUI] is one of messenger app on marketplace.
There are currently no plan to develop a built-in instant messager app for Firefox OS, other than the SMS/MMS app.
; How does the security system work? We're curious about the security system as the source of web app can be easily obtained like other web.
Many perspectives of Security concerns are addressed in official documentation[https://developer.mozilla.org/en/docs/Mozilla/Firefox_OS/Securityofficial documentation]
Like webpage game, running optimizer before publish your webapp can protect your resources. Moving some intelligent operations to server side also helps.