Can I get accurate geolocation in Python using HTML5 location tool?

I would like to get my accurate position using a Python script. I've tried different services based on IP location, which didn't work at all (always miles away from my actual location).

I noticed that the HTML5 geolocation tool is quite accurate on Firefox & Google Chrome, so I decided to use the selenium module to launch a web browser and grab my position from this.

Though I'm facing 2 issues: first, I can't force either Firefox or Chrome to allow location services on a local webpage. Second, I don't know how to grab the result of a javascript function in which I get my coordinates.

Here's what I've done so far:

geo.html

<html>
    <head>
        <title>Test</title>
    <p id="demo"></p>
        <script type="text/javascript">

var x = document.getElementById("demo");

function getLocation() {
    if (navigator.geolocation) {
        return navigator.geolocation.getCurrentPosition(showPosition);
    } else {
        return "Geolocation is not supported by this browser.";
    }
}



function showPosition(position) {
    x.innerHTML = "Latitude: " + position.coords.latitude +
    "<br>Longitude: " + position.coords.longitude;
}
        </script>
    </head>
    <body>
        <p>The element below will receive content</p>
        <div id="div" />
        <script type="text/javascript">getLocation()</script>
    </body>
</html>

test.py

from selenium import webdriver
from pyvirtualdisplay import Display

try:
    display = Display(visible=1, size=(800, 600))
    display.start()
    browser = webdriver.Firefox()
    browser.get('file:///path/to/geo.html')
    res = browser.execute_script("getLocation()")
    print(res)

except KeyboardInterrupt:
    browser.quit()
    display.stop()

Do you know how to solve this?

Thanks!