Yes firefox is the browser.
If I don't use sudo, I get the following when I click the start Triangle.
"2019-06-27T01:53:50: INDI Web Manager Started."
"2019-06-27T01:53:50: /usr/local/bin/indi-web --verbose --xmldir /usr/share/indi"
"2019-06-27T01:53:50: Traceback (most recent call last):\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2691, in _dep_map\n return self.__dep_map\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2806, in __getattr__\n raise AttributeError(attr)\nAttributeError: _Distribution__dep_map\n\nDuring handling of the above exception, another exception occurred:\n\nTraceback (most recent call last):\n File \"/usr/local/bin/indi-web\", line 6, in <module>\n from pkg_resources import load_entry_point\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 3241, in <module>\n @_call_aside\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 3225, in _call_aside\n f(*args, **kwargs)\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 3254, in _initialize_master_working_set\n working_set = WorkingSet._build_master()\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 583, in _build_master\n ws.require(__requires__)\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 900, in require\n needed = self.resolve(parse_requirements(requirements))\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 794, in resolve\n new_requirements = dist.requires(req.extras)[::-1]\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2727, in requires\n dm = self._dep_map\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2693, in _dep_map\n self.__dep_map = self._filter_extras(self._build_dep_map())\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2721, in _build_dep_map\n for extra, reqs in split_sections(self._get_metadata(name)):\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 3189, in split_sections\n for line in yield_lines(s):\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2378, in yield_lines\n for ss in strs:\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 2758, in _get_metadata\n for line in self.get_metadata_lines(name):\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 1423, in get_metadata_lines\n return yield_lines(self.get_metadata(name))\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 1419, in get_metadata\n value = self._get(self._fn(self.egg_info, name))\n File \"/usr/local/lib/python3.6/dist-packages/pkg_resources/__init__.py\", line 1607, in _get\n with open(path, 'rb') as stream:\nPermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.6/dist-packages/indiweb-0.1.7-py3.6.egg/EGG-INFO/requires.txt'"
"2019-06-27T01:53:51: INDI Web Manager Shut down with error."