JXAでSafari, Chrome, Firefoxを操作する際の違い ref: http://qiita.com/zakuroishikuro/items/194223d63b0f95ab7a63

autoreload_chrome.js

const DELAY = 3;

var Chrome = Application("Google Chrome");
var window = Chrome.windows[0]; //最前面のウィンドウを取得

while(window.exists()){ //無限ループ (ウィンドウが開いてなければ実行しない)
  window.tabs().forEach(function(tab, i){

    // タブ切り替え
    window.activeTabIndex = i + 1;
    delay(DELAY);

    // 更新
    tab.reload();
    delay(DELAY);
  });
};

autoreload_firefox.js

const DELAY = 3;

var Firefox = Application("Firefox");
var window = Firefox.windows[0]; //最前面のウィンドウを取得

SystemEvents = Application("System Events");

while(window.exists()){ //無限ループ (ウィンドウが開いてなければ実行しない)

  // タブ切り替え
  Firefox.activate();
  delay(0.3); //アクティブになるまで少し待つ
  SystemEvents.keystroke("]", {using:["command down", "shift down"]});
  delay(DELAY);

  // 更新
  Firefox.activate();
  delay(0.3); //アクティブになるまで少し待つ
  SystemEvents.keystroke("r", {using:"command down"});
  delay(DELAY);
};

autoreload_safari.js

const DELAY = 3;

var Safari = Application("Safari");
var window = Safari.windows[0]; //最前面のウィンドウを取得

while(window.exists()) { //無限ループ (ウィンドウが開いてなければ実行しない)
  window.tabs().forEach(function(tab){

    // タブ切り替え
    window.currentTab = tab;
    delay(DELAY);

    // 更新
    tab.url = tab.url();
    delay(DELAY);
  });
};

doShellScript

var app = Application.currentApplication();
app.includeStandardAdditions = true;

var date = app.doShellScript("date");

file0.js

var Safari = Application("Safari");
var doc = Safari.Document().make();
var win = Safari.windows[doc.name()];

//URL移動
win.currentTab.url = "http://qiita.com"

file4.txt

>> Firefox = Application("Firefox")
=> Application("Firefox")
>> Firefox.windows.length
=> 10
>> Firefox.documents()
=> []
>> 

file5.txt

>> Firefox = Application("Firefox")
=> Application("Firefox")
>> Firefox.windows.length
=> 10
>> Firefox.documents()
=> []
>> 

file6.js

varFirefox = Application("Firefox");

Firefox.windows[0].document();
//=> undefined

Firefox.windows[0].properties();
//=> {"document":null, "closeable":true, "zoomed":true, "class":"window", "index":1, "visible":true, "name":"Yahoo! JAPAN", "modal":false, "miniaturizable":true, "titled":true, "id":6188, "miniaturized":false, "floating":false, "resizable":true, "bounds":{"x":0, "y":23, "width":1280, "height":709}, "zoomable":true}

file6.txt

>> Firefox = Application("Firefox")
=> Application("Firefox")
>> Firefox.windows.length
=> 10
>> Firefox.documents()
=> []
>> 

file7.js

varFirefox = Application("Firefox");

Firefox.windows[0].document();
//=> undefined

Firefox.windows[0].properties();
//=> {"document":null, "closeable":true, "zoomed":true, "class":"window", "index":1, "visible":true, "name":"Yahoo! JAPAN", "modal":false, "miniaturizable":true, "titled":true, "id":6188, "miniaturized":false, "floating":false, "resizable":true, "bounds":{"x":0, "y":23, "width":1280, "height":709}, "zoomable":true}

JavaScriptで更新(doJavaScript関数)

Safari.doJavaScript("location.reload()", {in:tab});

JavaScriptで更新(execute関数)

Chrome.execute(tab, {javascript:"location.reload()"});

Terminal

var Terminal = Application("Terminal");
var tab = Terminal.windows[0].selectedTab(); // SafariはcurrentTab。名前統一してくれ

Terminal.doScript("echo 'hi.'", {in:tab});
var newTab = Terminal.doScript("echo 'hi new window.'");

URLの再セットによる更新

tab.url = tab.url();

ページ更新をJavaScriptでやるサンプル

Chrome.execute(tab, {javascript:"location.reload()"});