Seems broken with Dashboard Beta

[Keith94]

https://github.com/contact?form%5Bsubject%5D=Dashboard+beta

[Keith94]

Content Security Policy: Ignoring ‘x-frame-options’ because of ‘frame-ancestors’ directive.
Error: WebExtension context not found! ExtensionParent.jsm:994:13
Error: Could not establish connection. Receiving end does not exist.
background.js:139:2
Use of nsIFile in content process is deprecated.
NetUtil.jsm:266:12
Error: Could not establish connection. Receiving end does not exist. background.js:139:2
ReferenceError: GM_addStyle is not defined ExtensionContent.jsm:697:2
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist. Configs.js:199
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist.
Configs.js:210
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist. Configs.js:199
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist.
Configs.js:210
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist.
Configs.js:210
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist. Configs.js:199
[Show/hide message details.] Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist.
Configs.js:210
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.github.com/_private/browser/stats. (Reason: CORS request did not succeed).

[fregante]

Thanks for the report! This is a duplicate of #47

The issue is that there are two Notification buttons on responsive pages (like the new dashboard)