diff --git a/pythonlib/camoufox/addons.py b/pythonlib/camoufox/addons.py
index 974e3f1..c172d62 100644
--- a/pythonlib/camoufox/addons.py
+++ b/pythonlib/camoufox/addons.py
@@ -54,6 +54,10 @@ def confirm_paths(paths: List[str]) -> None:
     for path in paths:
         if not os.path.isdir(path):
             raise InvalidAddonPath(path)
+        if not os.path.exists(os.path.join(path, 'manifest.json')):
+            raise InvalidAddonPath(
+                'manifest.json is missing. Addon path must be a path to an extracted addon.'
+            )
 
 
 def get_open_port() -> int:
diff --git a/pythonlib/camoufox/ip.py b/pythonlib/camoufox/ip.py
index 50220c4..cca4ac6 100644
--- a/pythonlib/camoufox/ip.py
+++ b/pythonlib/camoufox/ip.py
@@ -6,7 +6,6 @@ from functools import lru_cache
 from typing import Dict, Optional, Tuple
 
 import requests
-from urllib3 import disable_warnings
 from urllib3.exceptions import InsecureRequestWarning
 
 from .exceptions import InvalidIP, InvalidProxy
@@ -108,6 +107,8 @@ def public_ip(proxy: Optional[str] = None) -> str:
             ip = resp.text.strip()
             validate_ip(ip)
             return ip
+        except requests.exceptions.ProxyError as e:
+            raise InvalidProxy(f"Failed to connect to proxy: {proxy}") from e
         except (requests.RequestException, InvalidIP):
             pass
     raise InvalidIP("Failed to get IP address")
diff --git a/pythonlib/pyproject.toml b/pythonlib/pyproject.toml
index 811c529..14381ba 100644
--- a/pythonlib/pyproject.toml
+++ b/pythonlib/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "camoufox"
-version = "0.3.2"
+version = "0.3.3"
 description = "Wrapper around Playwright to help launch Camoufox"
 authors = ["daijro <daijro.dev@gmail.com>"]
 license = "MIT"