Grammalecte  Check-in [478b05b29c]

    loadFile: function (spf) {
        // load ressources in workers (suggested by Mozilla extensions reviewers)
        // for more options have a look here: https://gist.github.com/Noitidart/ec1e6b9a593ec7e3efed
        // if not in workers, use sdk/data.load() instead
        try {
            let xRequest;
            if (typeof XMLHttpRequest !== "undefined") {
                xRequest = new XMLHttpRequest();
            } else {
                // JS sucks again… necessary for Thunderbird
                let { Cc, Ci } = require("chrome");
                xRequest = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance();
                xRequest.QueryInterface(Ci.nsIXMLHttpRequest);
            }
            xRequest.open('GET', spf, false); // 3rd arg is false for synchronous, sync is acceptable in workers
            xRequest.overrideMimeType('text/json');
            xRequest.send();
            return xRequest.responseText;
        }
        catch (e) {
            this.logerror(e);