Use local files with Browser extensions (kango framework)
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I'm working on a "browser extension" using "Kango Framework" (http://kangoextensions.com/)

When i want to link a css file i have to use external source (href='http://mysite.com/folder/mysite.css), how should i change the href to make is source from the plugin folder ? (ex: href='mylocalpluginfolder/localfile.css')

i've tried 'localfile.css' and putting the file in the same folder as the JS file.
$("head").append("<link id='flowsurf' href='http://mysite.com/folder/mysite.css' type='text/css' rel='stylesheet' />");

How should i change the json file to make it work ? Should i declare the files as "extended_scripts" or "content_scripts" ?

I've a hard time finding support for this framework, even though the admins are awesome !
Thanks for your help. (please do not suggest to use other solutions, because i won't be able to code plugins for IE and Kango is my only option for this). I didn't find any samples matching my need as the only example available on their site is linking to outside content (christmas tree).