Reporter@ Thanks for the issue.

Tested this issue on Windows 10 and 7 on the reported version 64.0.3282.119 and unable to reproduce this issue by following the steps mentioned in the original comment.

On Installing the Extension - Search manager on M63 build and upgrading Chrome to the latest Stable M64 build - 64.0.3282.119, can observe that the extension is enabled and no error message is seen on the Extension icon.

Request you to please retry the issue on a new chrome profile without any flags/extensions and update the thread with the observations.

Thanks..

Hi,
We managed to reproduce it a lot of times with different extension. All of them had a white background in NT in their CSS.

Thank you for providing more feedback. Adding requester "susanjunia.boorgula@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Unable to reproduce the issue on Win-7 and Win-10 using chrome reported version #64.0.3282.119 and latest canary #66.0.3335.0.

Following are the steps followed to reproduce the issue.
------------
1. Installed the extension from the web store (https://chrome.google.com/webstore/detail/search-manager/pilplloabdedfmialnfchjomjmpjcoej) or via registry
2. Updated chrome version from v63 to 64
3. Opened a New tab page.
4. Observed that the extension retained without any issues.

reporter@ - Could you please check the issue on latest canary #66.0.3335.0 by creating a new profile without any apps and extensions and please let us know if the issue still persist or not.

Thanks...!!

As there is no response from the reporter from so long, closing this issue as Won't fix.

@Reporter: Please feel to raise a new issue if issue is still seen.

Thanks!