How to open a local pdf by firefox extensions

we open a new tab to ‘https://www.mozilla.org/’ below;
browser.tabs.create({
url: ‘https://www.mozilla.org/’
});
//----------------------------------------------------------------------------------
what should do to open a pdf file like ‘c:\1.pdf’ or ‘d:\1.pdf’ or ‘e:\1.pdf’;
I wanted to auto decrypt for a pdf and open it by my firefox extensions.

It do not work like below;
browser.tabs.create({
url: ‘c:\1.pdf’
});