Apps not appearing in choice of default apps

Question

I've got Windows 10 and have recently shifted my browser from Chrome to Vivaldi.

However, I cannot get Vivaldi to open email links - it always reverts to Chrome. I have tried looking in default programs, but Vivaldi does not appear as a choice, and it doesn't let me navigate to a program.

Does anyone know how to force a change in the default?

Thanks.

This is the same problem as this question:Unable to set Brave browser as default browser in Windows 10 But the answer provided there no longer works: it is no longer possible to navigate to

Control Panel\All Control Panel Items\Default Programs\Set Default Programs

in Windows 10. I just get a blank Control panel and the following directory: C:\Windows\System32\control.exe

Grubbmeister · Accepted Answer · 2018-08-15T22:54:47.020

I found the answer here, and it's a bit crazy: https://forum.vivaldi.net/topic/26413/mailto-protocol/4

Also, don't muck about with the registry - I tried using another answer, and didn't get anywhere. The answer below works perfectly.

The relevant part is:

First, make sure custom handlers are allowed at vivaldi://settings/handlers. [should be chrome://settings/handlers]

Then, close Vivaldi.

Use JSONEdit, to edit "C:\Users\yourusername\AppData\Local\Vivaldi\User Data\Default\Preferences".

Copy the following to the clipboard:
{
   "enabled" : true,
   "ignored_protocol_handlers" : [],
   "registered_protocol_handlers" : [
      {
         "default" : true,
         "protocol" : "mailto",
         "url" : "https://inbox.google.com/?mailto=%s"
      }
   ]
}
Right-click on the root node in the Preferences file in JSONEdit and choose "Paste as child from clipboard". Then, rename the pasted object to "custom_handlers" and save your changes. (This is assuming you don't already have some custom handlers. If you do have some, you just need to add to the registered_protocol_handlers array.

In Vivaldi, go to vivaldi://settings/handlers [should be chrome://settings/handlers], click the 3 dots to the right of the inbox.google.com entry (that's now there) and choose "set as default". Then you can go into Default Apps in Windows and set Vivaldi as the default mail client. Then you should be good to go.

On a side, for Gmail (mail.google.com), it's:

navigator.registerProtocolHandler("mailto", "https://mail.google.com/mail/?extsrc=mailto&url=%s", "mail.google.com");

Ramhound · Answer 2 · 2018-08-15T02:00:56.373

However, I cannot get Vivaldi to open email links - it always reverts to Chrome. I have tried looking in default programs, but Vivaldi does not appear as a choice, and it doesn't let me navigate to a program.

I didn't have any problems setting the default browser to Vivaldi.

1) Install Vivaldi

2) Open Vivaldi

3) Click Settings from within Vivaldi