WARNING:root:python-html2text is not present. HTML pages will not be converted into text.
panda@panda-1215B-1215B:~$ firefox

(process:13355): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Vector smash protection is enabled.
WARNING: content window passed to PrivateBrowsingUtils.isWindowPrivate. Use isContentWindowPrivate instead (but only for frame scripts).
pbu_isWindowPrivate@resource://gre/modules/PrivateBrowsingUtils.jsm:25:14
nsBrowserAccess.prototype.openURI@chrome://browser/content/browser.js:15845:21