25.08b4
If a Filtered deck’s query has an unmatched parenthesis, the error message contains unescaped HTML:
<p>Invalid search: <U+2068>an opening bracket <code>(</code>
was found, but there was no closing bracket <code>)</code>
following it. If you want to search for a literal
<code>(</code>, wrap it in double quotes or prepend a
backslash: <code>"("</code> or <code>\(</code>
.<U+2069></p>
Not so in the Browser.