diff --git a/api/plugins.py b/api/plugins.py
index 94aa150e..fc46fcae 100644
--- a/api/plugins.py
+++ b/api/plugins.py
@@ -24,10 +24,11 @@ logger = logging.getLogger(__name__)
 # a settings key). Lowercase alnum + - / _, 1-64 chars, must start with a letter.
 _VALID_PLUGIN_NAME = re.compile(r"^[a-z][a-z0-9_-]{0,63}$")
 
-# Valid tab.path: a clean same-origin absolute path. Must start with '/', then
-# only safe path chars — no quotes, whitespace, control chars, query ('?') or
-# fragment ('#') so it can't break out of a JS-string nav arg or shadow routes.
-_VALID_PLUGIN_TAB_PATH = re.compile(r"^/[A-Za-z0-9._~/-]{0,255}$")
+# Valid tab.path: a clean same-origin absolute path. Must start with a single
+# '/' (NOT '//' — a leading '//' is a protocol-relative URL that would resolve
+# to a remote origin when assigned to iframe.src), then only safe path chars —
+# no quotes, whitespace, control chars, query ('?') or fragment ('#').
+_VALID_PLUGIN_TAB_PATH = re.compile(r"^/(?!/)[A-Za-z0-9._~/-]{0,255}$")
 
 # plugin_name -> manifest dict (as loaded from manifest.json)
 PLUGIN_MANIFESTS: dict[str, dict] = {}
diff --git a/static/panels.js b/static/panels.js
index 41e0b82d..a2444701 100644
--- a/static/panels.js
+++ b/static/panels.js
@@ -6513,7 +6513,6 @@ const enabled=plugin&&plugin.enabled!==false;
         <div class="provider-card-name">${esc((plugin&&plugin.name)||t('plugins_unnamed'))}</div>
         <div class="provider-card-meta">${esc((plugin&&plugin.key)||'plugin')}${version}</div>
       </div>
-      ${isDashboardPlugin?`<span class="provider-card-badge ${enabled?'':'plugin-card-badge-disabled'}">${enabled?t('plugins_enabled'):t('plugins_disabled')}</span>`:''}
       <span class="provider-card-badge ${badgeClass}">${badgeText}</span>
     </div>
     <div class="provider-card-body plugin-card-body">
diff --git a/static/style.css b/static/style.css
index 74f3d8ba..162a27ad 100644
--- a/static/style.css
+++ b/static/style.css
@@ -3492,11 +3492,15 @@ main.main > #mainPlugin{display:none;}
 .plugin-toggle-switch{position:relative;display:inline-block;width:32px;height:18px;flex-shrink:0;}
 .plugin-toggle-switch input{opacity:0;width:0;height:0;}
 .plugin-toggle-slider{position:absolute;cursor:pointer;inset:0;background:var(--border2);border-radius:9px;transition:background .2s;}
-.plugin-toggle-slider::before{content:'';position:absolute;height:12px;width:12px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:transform .2s;}
+.plugin-toggle-slider::before{content:'';position:absolute;height:12px;width:12px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:transform .2s;box-shadow:0 1px 2px rgba(0,0,0,.45);}
 .plugin-toggle-switch input:checked+.plugin-toggle-slider{background:var(--accent);}
 .plugin-toggle-switch input:checked+.plugin-toggle-slider::before{transform:translateX(14px);}
-.plugin-open-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;background:var(--accent);color:var(--accent-text);border:none;border-radius:7px;font-size:13px;font-weight:500;cursor:pointer;text-decoration:none;}
-.plugin-open-btn:hover{opacity:.85;}
+/* Ghost/outline button: --accent-text is not guaranteed to contrast against
+   --accent in every theme (e.g. it equals --accent in the default gold theme,
+   which renders invisible text on a filled block). Use the accent as the text +
+   border colour on the card's own surface, which is always legible. */
+.plugin-open-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:transparent;color:var(--accent);border:1px solid var(--accent);border-radius:7px;font-size:13px;font-weight:600;cursor:pointer;text-decoration:none;}
+.plugin-open-btn:hover{background:var(--accent);color:var(--bg);}
 
 /* ── Provider model tags ── */
 .provider-card-models{
diff --git a/tests/test_plugins_panel.py b/tests/test_plugins_panel.py
index 83992a0c..acb4915a 100644
--- a/tests/test_plugins_panel.py
+++ b/tests/test_plugins_panel.py
@@ -428,6 +428,7 @@ class TestPluginNameValidation:
         assert not plugins._VALID_PLUGIN_TAB_PATH.match("/x?y=1")         # query
         assert not plugins._VALID_PLUGIN_TAB_PATH.match("/x#frag")        # fragment
         assert not plugins._VALID_PLUGIN_TAB_PATH.match("/x y")           # whitespace
+        assert not plugins._VALID_PLUGIN_TAB_PATH.match("//evil.example/p")  # protocol-relative
 
     def test_open_button_and_toggle_use_no_inline_handlers(self):
         # tab.path / plugin.key must not be interpolated into inline onclick/