To use, download the project and in rules_1.json change "condition": {"urlFilter": "somewebsite.com", "resourceTypes": ["main_frame"] } to whatever website you want to redirct away from.
To choose what site you are redirecting to change "action": {"type": "redirect", "redirect": {"url": "https://www.gutenberg.org/"}},
You can add more sites following the format in rules_1.json.
When you finish all the changes you want go into chrome extensions developer mode and load the folder unpacked. If you ever go in and make changes to the rules_1.json file you have to reload the extension in the extensions settings for the changes to go into effect.