nvinside@ Thanks for the issue.

Tested this issue on Windows 10 on the reported version 66.0.3359.181 by following the below steps.

1. Launched Chrome and added uMatrix extension.
2. Navigated to the link https://github.com/CHEF-KOCH/NoScript-Whitelist/issues/4 and clicked on my-umatrix-backup.txt.
3. Not so sure how to import this file to uMatrix extension.
Attached is the screen cast of the steps followed.

Request you to please provide a screen cast of the steps followed to reproduce the issue, which will help in further triaging.

Thanks..

Deleted: 847309.mp4 1.0 MB

	847309.mp4 1.0 MB View Download

Hello, 
sorry for the bad issue title, I hope someone can fix it. Something went wrong on my end.

Steps to import the list into the uMatrix extension:
====================================================
* Go to the repository and click on the "my-umatrix-backup.txt" file. 
* The list will open within your browser, but you need to download it as .txt file, so press 'Raw' which opens the list as .txt file in your Browser.
* Copy & paste the the content from your Browser into a .txt file (the name should't matter). it's important that it's a .txt file otherwise uMatrix can't read it. 
* Now, go into your Browser and click the little gear on the very left when you click on the uMatrix icon in your Browser which opens the integrated settings menu. Within this settings menu there several tabs on the top, click the 'About' tab and press 'Restore from file...' this allows you to import the list. 

And the process here:
https://i.imgur.com/wFFWWPw.gif


The developer of uMatrix seems to be aware of the issue but he said it's a Chromium bug, I also can say that this works in normal Chrome Browser while other forks like Chromium or Chromium based Browser forcing the extension to crash. You see the memory goes up and then after some while it crashes. 

Thank you for providing more feedback. Adding the requester to the cc list.

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

Unable to reproduce the issue on reported chromium version 66.0.3359.0 using Windows 10. Attaching Screencast for reference.

Steps 
--------
1. Launched Chromium and added uMatrix extension
2. Navigated to the link https://github.com/CHEF-KOCH/NoScript-Whitelist/issues/4 and clicked on my-umatrix-backup.txt.
3.Clicked on Raw and  it got opened as .txt file in  Browser.
4.Copied and pasted into .txt file 
5.Clicked on Umatrix extension>>Settings>>About>> Restore from file and it allowed to import the list.
6.Tried to operated Myrules pane. 
We are able to operate successfully. No crash is seen.

@Reporter: Could you please review the steps we followed to reproduce the issue and confirm if anything being missed here.

Thanks! 

Deleted: Jun 6 2018 8_56 PM.webm 9.1 MB

	Jun 6 2018 8_56 PM.webm 9.1 MB View Download

Thanks, 
issue seems to be resolved now with uMatrix 1.3.8. 

Ticket can be closed and marked as resolved. 

Thank you for providing more feedback. Adding the requester to the cc list.

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

As per comment#6 the issue seems to be resolved hence closing this and marking it as Won't fix.

Thanks!