Secure Element API GlobalPlatform Member Draft Specification[0] defines onsepresent and onseremoval EventHandlers for sepresent and seremoval Events. We don't support them currently in our SE API. In this bug we can discuss if we need/want to implement them. Once Bug 1119152 will land we will support SEReader.isSEPresent. Developer will need to obtain the array of supported SEReaders from SEManager and check isSEPresent property to know if a particular SEReader is available. This is in line with the Open Mobile API specification (V2.05). At this moment I don't see any use case which would require onsepresent/onseremoval usage. [0] - http://globalplatform.github.io/WebApis-for-se/doc/

Firefox OS is not being worked on