Add more stealth evasions
Add more stealth evasions

Set `navigator.platform = 'Win32'` instead of the default `Linux` as we
usualy run Brozzler on Linux.

Randomize the `navigator.deviceMemory` and
`navigator.hardwareConcurrency` to avoid browser fingerprinting.

Define `window.Notification` which is not defined because we run Chrome
with CLI parameter `--disable-notifications`.

internetarchive/brozzler,internetarchive/brozzler,internetarchive/brozzler,internetarchive/brozzler