title: How to sign Firefox addon after editing it?
body: <p>So the story is like this. I debug a site which throws a lot of warnings:</p>
  
  <blockquote>
    <p>Strict-Transport-Security: The connection to the site is
    untrustworthy, so the specified header was ignored.</p>
  </blockquote>
  
  <p>That is because there is no proper certificate for localhost. But that is very annoying and I was not able to find option to filter out firebug console. So I decided to go into code. I found that firebug is inside <code>~/.mozilla/firefox/blablabla.bla/extensions/firebug@software.joehewitt.com.xpi</code> and that is zip which I could open with Vim and got to <code>content/firebug/console/errrors.js</code>, find there a variable <code>pointlessErrors</code> and append my message to it. </p>
  
  <p>Firefox ignores changes but after I restart it, it gives me message that firebug was not verified and was disabled. I's probably good, because it will protect me from lot's of risks, but I'm sure in my changes. </p>
  
  <p>How to tell firefox that? Or how to properly make changes to plugins?</p>
  
  <p>Or is there some option for Firefox to shut up about Strict-Transport-Security? (I know, I know, too many questions in one question, but I want to find best solution).</p>