How do I close a firefox tab from a greasemonkey script?

Question

I have a greasemonkey user script with this single line of code...

window.close();

but firefox does not allow a user script to close a window (as reported by an error message in the error console)

Is there a work around to this problem?

Answer 1

You need to change configuration settings of Firefox (about:config) to allow this.

Steps:

1. Go to address bar and type about:config
2. Go to parameter dom.allow_scripts_to_close_windows
3. Set its value as true

Now your script can close the TAB with 'window.close()'

eg.

function closeTab(){
    window.open('', '_self', '');
    window.close();
} 

Answer 2

由于 Firefox 以与外部网站上的脚本代码相同的权限对待 Greasemonkey 代码，因此不可能只允许 Greasemonkey 代码能够关闭窗口，而不允许常规脚本。

Answer 3

By now some of the -monkies allow the use of @grant option to officially unlock commands like window.close() without going to about:config . For example, in Tampermonkey :

// @grant window.close
// @grant window.focus

(The latter grant allows you to re-focus the browser on your window.) This would remove the error.

EDIT: As @baptx correctly mentions in the comments, the browser's security options should be set to allow scripts to close windows, too.