Localizing your extension html pages in a snap!
Here is an astute method I got from Vitaly a colleague I worked with a few years ago for easily and quickly localizing your html files. It relies on jquery, the i18 chrome API and the corresponding dictionnary built in your extension package.   1/ Copy paste the following jquery code into a file you'll name translate.js    $($=> {      $('[translate]').each((i, elem)=> {        let $elem = $(elem);        $elem.text(chrome.i18n.getMessage($elem.text()));      });    });        2/ edit each and every html page of your extension:    add a "translate" attribute to all elements requiring translation like:     <span translate>theStringToTranslate</span>    include the above translate.js in your page.       Voila ... !