Build root Tor Browser Bundle path using the supplied binary's path

Based on @baum314nk's comment:
#159 (comment)

Fixes #159.

Author: gunesacar

setup.py

@@ -8,12 +8,12 @@
     name="tbselenium",
     description="Tor Browser automation with Selenium",
     keywords=["tor", "selenium", "tor browser"],
-    version="0.5.3",
+    version="0.6.1",
     long_description=long_description,
     long_description_content_type='text/markdown',
     url='https://github.com/webfp/tor-browser-selenium',
     packages=["tbselenium", "tbselenium.test"],
     install_requires=[
-        "selenium>=3.14"
+        "selenium>=4"
     ]
 )

tbselenium/tbdriver.py

@@ -1,6 +1,6 @@
 import shutil
 from os import environ, chdir
-from os.path import isdir, isfile, join, abspath
+from os.path import isdir, isfile, join, abspath, dirname
 from time import sleep
 from http.client import CannotSendRequest
 from selenium.webdriver.support.ui import WebDriverWait
@@ -160,6 +160,10 @@ def setup_tbb_paths(self, tbb_path, tbb_fx_binary_path, tbb_profile_path,
                                         % tbb_path)
             tbb_fx_binary_path = join(tbb_path, cm.DEFAULT_TBB_FX_BINARY_PATH)
             tbb_profile_path = join(tbb_path, cm.DEFAULT_TBB_PROFILE_PATH)
+        else:
+            # based on https://github.com/webfp/tor-browser-selenium/issues/159#issue-1016463002
+            tbb_path = dirname(dirname(tbb_fx_binary_path))
+
         if not isfile(tbb_fx_binary_path):
             raise TBDriverPathError("Invalid Firefox binary %s"
                                     % tbb_fx_binary_path)