if (typeof allKeywords == 'undefined') {
	console.log('NOT plugable page');
} else {
	console.log('IS plugable page');
}

Some Sample Code

Sample URLs

https://answermatty.com/s/a4287-82124-d8287

Other results pages may exist, or be added in the future, such as:
https://answermatty.com/s/a4287-82124-d8287/History
or with any similar URL:
https://answermatty.com/s/a4287-82124-d8287/*

If the allKeywords javascript variable exists and has content, it is a plugin appropriate page.

Copy this code into your browser console to see the results

console.log(searchTerm); // String: search term
console.log(allKeywords); // Array: unique list of all results
console.log(regionCode); // String: region code
console.log(languageCode); // String: language code

// Output all keywords on page
$('plug').each(function( index ) {
	console.log(this.keyword);
});

// Create an element for each search result
$('plug').each(function( index ) {
	// Use a child div so it doesn't influence anyone else's extensions/plugins and theirs don't influence ours
	var a = document.createElement("a");
	a.innerHTML = (this.keyword.length * 100).toLocaleString();
	a.setAttribute('class', 'HappyPluginProvider');
	a.setAttribute('href', 'https://google.com/search?q=' + encodeURIComponent(this.keyword + ' and mangoes'));
	a.setAttribute('target', '_blank');
	this.appendChild(a);
	// console.log(this.keyword);
});

// Add a button to the pluginButton area

var a = document.createElement("a");
a.innerHTML = "Run Our Thingy";
a.setAttribute('class', 'roundButton');
a.setAttribute('onclick', 'javascript:alert("boo!"); void 0;');
$('pluginButtons')[0].appendChild(a);

// Add some text output up in the header area

$('pluginWhatever').append('<div class="leftAlign" style="max-width: 500px; background: #f9f9f9; color: #111; padding: 3px; border-radius: 5px;">Spider Plugin processed:<br>'+allKeywords.length.toLocaleString()+' keywords</div>');