[Feature Request] l Heuristics blocking #4135

Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

Description

I would like to propose a feature with will improve the extension's efficiency: "Heuristics blocking", with would solve many blocking and missed block issues.

Motivations

I had observed on many websites that to bypass the blocking attempt's instead of using of blockable elements, oftenly the website legimite scripts become victim of beeing tampered with and oftenly is added malcious code.

For example of the result of the script tampering l, we can include among others (but not limited to):

1. overriding of legimite website's events releated with user interaction to:

• collect (and sell to third parties) informations about tracked user's activity [privacy violation]

• open an unreleated external website (oftenly connected with point above)

• etc.

2. generate a random "class" or "id" attributes identifier to prevent blocking of adversment

Please consider developing and implementing of such functionality ASAP. Thanks

PS: On my end, I attempt to find a sollution for it as well and when I get something to show, I let you know. ok?

A specific URL where the issue occurs.

Not applicable

Steps to Reproduce

Not applicable

Expected behavior

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Troubleshooting information

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