amp="true" doesn't get detected by DeAMP regex

[ShivanKaul]

Description

Some AMP pages that should be redirected to non-AMP page aren't. These are AMP pages that have <... amp="true" ...>, they don't get caught by the AMP detection regex.

Steps to reproduce

Make sure DeAMP pref is on in shields settings.

1. Go to https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump.amp
2. See that it is an AMP page

Actual result

AMP page

Expected result

Not AMP page: URL should redirect to canonical link https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump

Issue reproduces how often

Easily

Marking as Android because De-AMP is mainly used on Android.

Test Cases

1. If De-AMP preference is on, navigate to https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump.amp and see that it auto-redirects
2. Go to google.com and search for "fox business presidential salaries" and click the above link (should be in top few). Check that it also auto-redirects.

[stephendonner]

Verified PASSED using 1.48.134 on a Google Pixel XL running Android 9

Steps:

1. installed 1.48.134
2. launched Brave
3. loaded https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump.amp and confirmed it redirected to https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump
4. searched Google.com for fox presidential salaries and tapped the result, which loads the AMP page but redirects also to https://www.foxbusiness.com/features/presidential-salaries-from-washington-to-trump

step 3, DevTools	step 3, device	step 4, search result	step 4, final URL	final page