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首先和android一样需要在manifest中对activity做声明，android的是manifest.xml而firefox os 则是mabifest.webapp {   // Other App Manifest related stuff   // Activity registration   "activities": {     // The name of the activity to handle (here "pick")     "pick": {       "href": "./pick.html",       "disposition": "inline",       "filters": {         "type": ["image/*","image/jpeg","image/png"]       },       "returnValue": true     }   } } 其次是启动要跳转到的activity 即 Starting an activityvar activity = new MozActivity({   // Ask for the "pick" activity   name: "pick",   // Provide de data required by the filters of the activity   data: {     type: "image/jpeg"   } }); activity.onsuccess = function() {   var picture = this.result;   console.log("A picture has been retrieve"); }; activity.onerror = function() {   console.log(this.error); }; 最后是你所启动的activity要执行什么样的操作 navigator.mozSetMessageHandler('activity', function(activityRequest) {   var option = activityRequest.source;   if (option.name === "pick") {     // Do something to handle the activity     ...     // Send back the result     if (picture) {       activityRequest.postResult(picture);     } else {       activityRequest.postError("Unable to provide a picture");     }   } });

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