diff --git a/.gitignore b/.gitignore
index 966f7c7..d3979dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,4 +17,7 @@ var/
 
 # Installer logs
 pip-log.txt
-pip-delete-this-directory.txt
\ No newline at end of file
+pip-delete-this-directory.txt
+
+pyvenv.cfg
+bin/
diff --git a/.travis.yml b/.travis.yml
index 7a17b2b..cb920e3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,20 @@
 language: python
 python:
-  - "2.7"
+  # https://endoflife.date/python
+  # goes away in sep 2020
+  - "3.5"
+  # goes away in dec 2021
   - "3.6"
+  # goes away in jun 2023
+  - "3.7"
+  # goes away in oct 2024
+  - "3.8"
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
-install: 
+install:
  - pip install requests
  - pip install nose
- - pip install mixpanel-py
 # command to run tests, e.g. python setup.py test
-script:  nosetests --nocapture
+script: nosetests --nocapture
 notifications:
   email:
     on_success: never
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e80f06c..a1b9e8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,12 @@ This file will only list released and supported versions, usually skipping over
 Unreleased
 ==========
 
-* Python 3 upgrade
+4.0.0
+=====
+
+* Upgrades to Python 3.0. Python 2 is no longer supported
+* Switches from PyGtk to PyGObject.
+* AppIndicator is no longer supported, because it is Python 2 only
 
 3.0.0
 =====
diff --git a/hackertray/__init__.py b/hackertray/__init__.py
index 0bf4844..2b70fc9 100644
--- a/hackertray/__init__.py
+++ b/hackertray/__init__.py
@@ -87,10 +87,11 @@ class HackerNewsApp:
         btnQuit.show()
         btnQuit.connect("activate", self.quit)
         self.menu.append(btnQuit)
-
         self.menu.show()
-
         self.ind.set_menu(self.menu)
+
+        if args.firefox == "auto":
+            args.firefox = Firefox.default_firefox_profile_path()
         self.refresh(chrome_data_directory=args.chrome, firefox_data_directory=args.firefox)
 
     def toggleComments(self, widget):
@@ -205,7 +206,7 @@ def main():
     parser.add_argument('-v', '--version', action='version', version=Version.current())
     parser.add_argument('-c', '--comments', dest='comments', action='store_true', help="Load the HN comments link for the article as well")
     parser.add_argument('--chrome', dest='chrome', help="Specify a Google Chrome Profile directory to use for matching chrome history")
-    parser.add_argument('--firefox', default=self.default_firefox_profile(), dest='firefox', help="Specify a Firefox Profile directory to use for matching firefox history")
+    parser.add_argument('--firefox', dest='firefox', help="Specify a Firefox Profile directory to use for matching firefox history. Pass auto to automatically pick the default profile")
     parser.set_defaults(comments=False)
     parser.set_defaults(dnt=False)
     args = parser.parse_args()
diff --git a/hackertray/firefox.py b/hackertray/firefox.py
index 187a29e..ae4bd66 100644
--- a/hackertray/firefox.py
+++ b/hackertray/firefox.py
@@ -18,8 +18,8 @@ class Firefox:
             parser = configparser.ConfigParser()
             parser.read(profile_file_path)
             for section in parser.sections():
-                if parser[section]["Default"] == "1":
-                    if parser[section]["IsRelative"] == "1":
+                if parser.has_option(section,"Default") and parser[section]["Default"] == "1":
+                    if parser.has_option(section,"IsRelative") and parser[section]["IsRelative"] == "1":
                         profile_path = str(Path.home().joinpath(".mozilla/firefox/").joinpath(parser[section]["Path"]))
                     else:
                         profile_path = parser[section]["Path"]
@@ -45,8 +45,8 @@ class Firefox:
 
     @staticmethod
     def setup(config_folder_path):
-        file_name = os.path.abspath(config_folder_path+Firefox.HISTORY_FILE_NAME)
+        file_name = os.path.abspath(config_folder_path + Firefox.HISTORY_FILE_NAME)
         if not os.path.isfile(file_name):
-            print("ERROR: ", "Could not find Firefox history file", file=sys.stderr)
+            print("ERROR: Could not find Firefox history file, using %s" % file_name)
             sys.exit(1)
         shutil.copyfile(file_name, Firefox.HISTORY_TMP_LOCATION)
diff --git a/setup.py b/setup.py
index c259950..f158d92 100644
--- a/setup.py
+++ b/setup.py
@@ -10,8 +10,8 @@ setup(name='hackertray',
       description='Hacker News app that sits in your System Tray',
       long_description='HackerTray is a simple Hacker News Linux application that lets you view top HN stories in your System Tray. It relies on appindicator, so it is not guaranteed to work on all systems. It also provides a Gtk StatusIcon fallback in case AppIndicator is not available.',
       keywords='hacker news hn tray system tray icon hackertray',
-      url='http://captnemo.in/hackertray',
-      author='Abhay Rana',
+      url='https://captnemo.in/hackertray',
+      author='Abhay Rana (Nemo)',
       author_email='me@captnemo.in',
       license='MIT',
       packages=find_packages(),