I'm using Visual Studio 2017. Our organization is blocking Visual Studio Marketplace (403 HostBrowserBlocked). Therefore, the way we normally download and install extensions is failing.
When we find a useful extension on the Visual Studio Marketplace, they want us to download a ZIP file.
What are the instructions for using this ZIP file properly? Apparently this is common knowledge because it isn't clear on the download page.
I have downloaded the ZIP file and looked for the missing VSIX file. I have copied the extracted ZIP file to "Extensions" folder of the Visual Studio installation and still failures.
It is Internet Explorer renames .vsix to .zip. You can use other web browser to download as .vsix.