Setting the Firefox profile when using Selenium and Firefox Portable - selenium

Question

I'm in a setup, in which I need to use Firefox Portable 38.7.1 for my Selenium tests (version 2.53.0). Everything works fine, but now I need to configure a proxy.
I configured it in the default profile (it gets saved in ${FF_PORTABLE_PATH}/Data/profile/prefs.js)
user_pref("network.proxy.http", "proxyHost");
user_pref("network.proxy.http_port", proxyPort);
user_pref("network.proxy.share_proxy_settings", true);
user_pref("network.proxy.ssl", "proxyHost");
user_pref("network.proxy.ssl_port", 51854);
user_pref("network.proxy.type", 1);
...
When starting the browser manually, this works fine. However, when triggered by Selenium an anonymous profile is created and used, which doesn't have my proxy settings.
I tried to specify the profile when starting the node.
At first I tried using -Dwebdriver.firefox.profile:
java -jar selenium-server-standalone-2.53.0.jar -role node -Dwebdriver.firefox.profile=default
Then I tried to use the default profile as a template using -firefoxProfileTemplate:
java -jar selenium-server-standalone-2.53.0.jar -role node -firefoxProfileTemplate "${FF_PORTABLE_PATH}/Data" -nodeConfig ...
I also created a new profile (using the ProfilistPortable plugin) and specified it on startup of the node (with the webdriver.firefox.profile-parameter).
In all cases the Selenium node opens up Firefox Portable with a "clean" anonymous profile without my proxy settings.
Can anyone help me how to get this setup working with Firefox Portable? I don't really need separate profiles. As long as I can force Selenium to use a profile, which has the proxy configured, I'm fine.
Here's my nodeConfig:
{
"capabilities": [
{
"browserName": "firefox",
"version": "38.7.1",
"firefox_binary": "${FF_PORTABLE_PATH}\\FirefoxPortable.exe",
"platform": "WINDOWS",
"maxInstances": 1,
"seleniumProtocol": "WebDriver"
}
],
"configuration": {
"proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
"maxSession": 1,
"port": 5550,
"host": "ip",
"register": true,
"registerCycle": 5000,
"hubHost": "localhost",
"hubPort": 4440
}
}
I use ${FF_PORTABLE_PATH} in the examples above. In reality this (fully qualified) path is hardcoded in all my settings.

Answer 1

I had the same issue. Digging into selenium code I was able to find a solution.
FirefoxBinary binary = new FirefoxBinary(new File(portablePath.trim()));
File profile_dir = new File(portablePath.trim().replace("FirefoxPortable.exe", "/Data/profile"));
fp = new FirefoxProfile(profile_dir);
dc.setCapability(FirefoxDriver.PROFILE, fp);
driver = new FirefoxDriver( binary , fp, dc);