JavaScript code for homepage under Firefox

In IE, we can easily use the following code to set the homepage:

Click here to make devdao.com your default homepage!
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]
However, firefox does not work.

To use the script to set the homepage in firefox, you must first confirm that in "about: config" of the browser
Signed. applets. codebase_principal_support
Set to true

Then use the following script:
<Input type = "button" value = "set home page" onclick = "setHomepage ();"/>
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]