Prashant Kajale Prashant Kajale - 8 months ago 106
Javascript Question

Download file on Firefox with protractor

I need to download a zip file on Firefox with protractor.
On clicking on download link, Windows dialog asking to Open/Save the file pops up. So How can I handle that. What args do I need to pass to driver?
With chrome I can do that with
download: {
'prompt_for_download': false

but what should i do with firefox.


The problem is - you cannot manipulate that "Save As..." dialog via protractor/selenium. You should avoid it being opened in the first place and let firefox automatically download the files of a specified mime-type(s) - in your case application/zip.

In other words, you need to fire up Firefox with a custom Firefox Profile setting the appropriate preferences:

var q = require("q");
var FirefoxProfile = require("firefox-profile");

var makeFirefoxProfile = function(preferenceMap, specs) {
    var deferred = q.defer();
    var firefoxProfile = new FirefoxProfile();

    for (var key in preferenceMap) {
        firefoxProfile.setPreference(key, preferenceMap[key]);

    firefoxProfile.encoded(function (encodedProfile) {
        var capabilities = {
            browserName: "firefox",
            firefox_profile: encodedProfile,
            specs: specs

    return deferred.promise;

exports.config = {
    getMultiCapabilities: function() {
        return q.all([
                    "": 2,
                    "": "/path/to/save/downloads",
                    "browser.helperApps.neverAsk.saveToDisk": "application/zip"

    // ...

Here we are basically saying: Firefox, please download zip files automatically, without asking into the /path/to/save/downloads directory.