main.py

    def get_js(self):
        js = memcache.get(CACHE_EXT_VERSIONS_JS)
        if js is None:
            params = { 
            'releases': {
                'chrome': self.get_version(PRODUCT_CHROME), 
                'safari': self.get_version(PRODUCT_SAFARI),
                'firefox': self.get_version(PRODUCT_FIREFOX)
            },
            'betas': {
                'chrome': self.get_version(PRODUCT_CHROME_BETA),
                'safari': self.get_version(PRODUCT_SAFARI_BETA),
                'firefox': self.get_version(PRODUCT_FIREFOX_BETA)
            }
            }
            js = json.dumps(params) + '\nupdate_versions(versions);'
            memcache.set(CACHE_EXT_VERSIONS_JS, js)
        return js;