Fix single page ETP testing

[say-yawn]

About this PR

After #12, some testing revealed issues with the Cookie Blocking and on the summary. This PR makes fixes on the summary and Cooking Blocking and adds the summary section for Level 1 list test.

Acceptance Criteria

• "Summary" for Social Tracking Protection works properly
• "Summary" section exists for Level 1 list tests
• Cookie Blocking works properly
• Replace the link on Deprecate and remove outdated test pages #15 to the the newly updated test page
• Update README as seen on Remove readme related to outdated test pages #16

[englehardt]

Things we expect to be blocked.

Release

Default mode, Standard ETP, release Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256
• Cookies from ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256
• Referrer: strict-origin-when-cross-origin for trackers, fbclid stripped on second navigation

Default mode, Strict ETP, release Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256, ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256
• Referrer: strict-origin-when-cross-origin for trackers, fbclid stripped on second navigation

Private Browsing mode, Standard/Strict ETP, release Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256, ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256
• Referrer: strict-origin-when-cross-origin for all resources, fbclid stripped on second navigation

Nightly

Default mode, Standard ETP, Nightly Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256
• Cookies from ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256, and content-track-digest256
• Referrer: strict-origin-when-cross-origin for trackers, fbclid stripped on second navigation

Default mode, Strict ETP, release Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256, ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256
• Cookies from content-track-digest256
• Referrer: strict-origin-when-cross-origin for trackers, fbclid stripped on second navigation

Private Browsing mode, Standard/Strict ETP, release Firefox:

• Resources from: base-fingerprinting-track-digest256, base-cryptomining-track-digest256, ads-track-digest256, analytics-track-digest256, social-track-digest256, social-tracking-protection-facebook-digest256, social-tracking-protection-linkedin-digest256, social-tracking-protection-twitter-digest256
• Cookies from content-track-digest256
• Referrer: strict-origin-when-cross-origin for all resources, fbclid stripped on second navigation