This is an extension for the phpBB forums software. You need an instalation of phpBB 3.1.x to use this.
Adds content securety headers to phpBB
To install this extension download it from here and upload the files in your forum under /ext/tas2580/contentsecurety. After that go to the Admin panel of your forum and navigate in to Customise -> Extension Management -> Extensions. Search this extension in the list of extensions and click on Enable.
Help to translate
If you use the extension in your forum and translated it therefor in your language, it would be nice if you would send me a pull request. Also it may be that existing translations after uptates of the extensions are incomplete. So you can help me if you complete or correct existing language files.