Extract Reddit cookies from Chromium, not just Chrome

README.md

@@ -127,7 +127,7 @@ rdt comment 3 "Great post!"           # Comment on result #3
 rdt-cli supports browser cookie extraction to authenticate with Reddit:
 
 1. **Saved cookies** — loads from `~/.config/rdt-cli/credential.json`
-2. **Browser cookies** — auto-detects installed browsers and extracts cookies (supports Chrome, Firefox, Edge, Brave)
+2. **Browser cookies** — auto-detects installed browsers and extracts cookies (supports Chromium, Chrome, Firefox, Edge, Brave)
 
 `rdt login` automatically tries all installed browsers and uses the first one with valid cookies.
 
@@ -364,7 +364,7 @@ rdt comment 3 "Great post!"           # 评论
 rdt-cli 支持浏览器 Cookie 提取来认证 Reddit：
 
 1. **已保存 Cookie** — 从 `~/.config/rdt-cli/credential.json` 加载
-2. **浏览器 Cookie** — 自动检测已安装浏览器并提取（支持 Chrome、Firefox、Edge、Brave）
+2. **浏览器 Cookie** — 自动检测已安装浏览器并提取（支持 Chromium、Chrome、Firefox、Edge、Brave）
 
 Cookie 保存后有效期 **7 天**，超时后自动尝试从浏览器刷新。
 

rdt_cli/auth.py

@@ -15,7 +15,7 @@
 import time
 from typing import Any
 
-from .constants import CONFIG_DIR, CREDENTIAL_FILE, REQUIRED_COOKIES
+from .constants import BROWSER_COOKIE_FNS, CONFIG_DIR, CREDENTIAL_FILE, REQUIRED_COOKIES
 
 logger = logging.getLogger(__name__)
 
@@ -140,7 +140,10 @@ def _extract_subprocess() -> Credential | None:
     script = '''
 import browser_cookie3, json
 cookies = {}
-for browser_fn in [browser_cookie3.chrome, browser_cookie3.firefox, browser_cookie3.edge, browser_cookie3.brave]:
+for name in ["chromium", "chrome", "firefox", "edge", "brave"]:
+    browser_fn = getattr(browser_cookie3, name, None)
+    if browser_fn is None:
+        continue
     try:
         jar = browser_fn(domain_name=".reddit.com")
         for c in jar:
@@ -178,12 +181,15 @@ def _extract_direct() -> Credential | None:
         logger.warning("browser-cookie3 not available for direct extraction")
         return None
 
-    for fn in [browser_cookie3.chrome, browser_cookie3.firefox, browser_cookie3.edge, browser_cookie3.brave]:
+    for name in BROWSER_COOKIE_FNS:
+        fn = getattr(browser_cookie3, name, None)
+        if fn is None:
+            continue
         try:
             jar = fn(domain_name=".reddit.com")
             cookies = {c.name: c.value for c in jar}
             if any(k in cookies for k in REQUIRED_COOKIES):
-                cred = Credential(cookies=cookies, source=f"browser:{fn.__name__}")
+                cred = Credential(cookies=cookies, source=f"browser:{name}")
                 save_credential(cred)
                 return cred
         except Exception:

rdt_cli/constants.py

@@ -71,6 +71,11 @@
 # ── Cookie keys required for authenticated sessions ─────────────────
 REQUIRED_COOKIES = {"reddit_session"}
 
+# Chromium first: Arch/Omarchy and many Linux defaults use it, not Chrome.
+# browser_cookie3.chrome() only reads ~/.config/google-chrome and cannot
+# decrypt Chromium's cookie DB, so chromium must be a first-class loader.
+BROWSER_COOKIE_FNS = ("chromium", "chrome", "firefox", "edge", "brave")
+
 # ── Sort options ────────────────────────────────────────────────────
 SORT_OPTIONS = ["hot", "new", "top", "rising", "controversial", "best"]
 

tests/test_cli.py

@@ -183,6 +183,12 @@ def test_required_cookies(self):
         from rdt_cli.constants import REQUIRED_COOKIES
         assert "reddit_session" in REQUIRED_COOKIES
 
+    def test_browser_cookie_fns_include_chromium(self):
+        from rdt_cli.constants import BROWSER_COOKIE_FNS
+        assert BROWSER_COOKIE_FNS[0] == "chromium"
+        assert "chrome" in BROWSER_COOKIE_FNS
+        assert "firefox" in BROWSER_COOKIE_FNS
+
     def test_search_sort_options(self):
         from rdt_cli.constants import SEARCH_SORT_OPTIONS
         assert "relevance" in SEARCH_SORT_OPTIONS