UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.26 Safari/537.36

Steps to reproduce the problem:
1. Open Chrome
2. Browse to any site
3. Attempt one of many operations including but not limited to:

a) Downloading a file
b) Perform normal Chrome site navigation
c) Enable ANY fully-supported Chrome extension installed from the Chrome web store that performs ANY redirection-based operations

What is the expected behavior?
Matching the above operations in "steps to reproduce" section:

a) File downloads or select download location window appears
b) Successful navigation
c) Normal extension operations

What went wrong?
Matching the above operations in "steps to reproduce" section:

a) File does NOT download and instead the new anti-redirection (mini-ad-blocking?)_code prevents download with this indicator:  https://i.imgur.com/eRTsI47.png
b) Navigation is at times interrupted with: https://i.imgur.com/Re4NwXx.png
c) Extension operations instead generate: https://i.imgur.com/90nqnk9.png

Did this work before? Yes v65

Chrome version: 66.0.3359.26  Channel: dev
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

I have attempted to disable the new built-in ad-blocking with the flag #enable-framebusting-needs-sameorigin-or-usergesture, and it does not seem to rectify (DISABLE) this new behavior.

Again the order of this bug is:
1. This appears in the omni-bar:  https://i.imgur.com/Re4NwXx.png
2. It then quickly collapses to this which I believe is why many users have no idea it is even occurring: https://i.imgur.com/UFlyucZ.png
3. Clicking this new icon reveals this new redirection blocking either with file, URL, or chrome-extension location - Examples:

File: https://i.imgur.com/eRTsI47.png
URL: (Same as file)
chrome-extension: https://i.imgur.com/90nqnk9.png

**Of interest/note: The above file redirect block was literally only after downloading OVER A DOZEN zip files from the EXACT SAME base URL! So, half-way through 20+ free file downloads, Chrome literally CHANGED how it interpreted that site and suddenly, in the same session, and SAME BASE TAB (all downloads were launched one at a time into new tabs) began to block simple file downloads and began interpreting them as "redirections".  This also absolutely aligns with what I see using the extension "The Great Suspender" (and others), that in the case of TGS in essence redirects to a suspended local page to free resources. With this new Chrome code however, a totally RANDOM set of locations (of which some will work then suddenly stop) will be blocked and then later Chrome again changes it's mind and allows them to suspend (redirect).  This new code is clearly not ready for prime-time since at best, it is totally inconsistent.  I may also take some screen captures showing this behavior if I get some time and if needed.

There should be a Chrome flag at the very least to simply disable ALL of this new redirection behavior and continue with the pre-v66 behavior, that I initially believed the #enable-framebusting-needs-sameorigin-or-usergesture flag was intended to do.