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Test Info:

/* Any copyright is dedicated to the Public Domain.
"use strict";
add_task(async function maxTouchPoints() {
await new Promise(resolve => {
SpecialPowers.pushPrefEnv(
{
set: [["dom.maxtouchpoints.testing.value", 5]],
},
resolve
);
});
let tab = await BrowserTestUtils.openNewForegroundTab(
gBrowser,
"data:text/html,Test page for navigator.maxTouchPoints"
);
await SpecialPowers.spawn(tab.linkedBrowser, [], function () {
is(content.navigator.maxTouchPoints, 5, "Should have touch points.");
});
BrowserTestUtils.removeTab(tab);
});