There is now an application set to open the URL about:blank.
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Fixes #1.
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README.md Update README.md Jan 29, 2017

README.md

AboutWeb

This is a simple app designed to silence this dialog:

error message

That's it. That's all it does.

Do you need this app?

Browsers are supposed to display the URL about:blank as a blank page. Unfortunately, some web browsers or similar apps do not know how to do this and will ask macOS to handle this URL. Apps that do this are misbehaving, but until these apps are fixed, you can use AboutWeb to silence these errors.

Usage

  1. Download this repo and open it to untar, or git clone https://github.com/szhu/AboutWeb.git.
  2. You may need to manually open the app once to get rid of the Gatekeeper warning. You can do this by right-clicking on the app and selecting Open, or by running cd AboutWeb; bin/un-gatekeeper-ify.
  3. That's it! This app will register itself to open about: URLs and will handle them by doing nothing.

Uninstall

If you no longer need AboutWeb, just trash the AboutWeb folder or the app.

References