meta refresh blocker クローム用拡張

manifest.json

{
	"manifest_version": 2,
	"name" : "meta refresh blocker",
	"version" : "0.1",
	"description" : "meta refresh タグを無効にする拡張です。",
	"content_scripts" : [{
		"matches" : ["*://*/*"],
		"run_at" : "document_idle",
		"all_frames" : true,
		"js" : [ "metarefreshblocker.js" ]
	}]
}

metarefreshblocker.js

/** metarefreshblocker.js */

(function(){

	var nodes = document.querySelectorAll( 'meta[HTTP-EQUIV="refresh"]' );
	if ( nodes.length > 0 ) {
		var blocked = document.createElement('div');
		blocked.setAttribute('style', 'display:block;background-color:#FDA;color:#000;border:1px solid #333;padding:.5em;');
		for( var i=0,l=nodes.length; i<l; i++ ) {
			var a = document.createElement('a');
			var elm = document.createElement('div');
			var url = nodes[i]['content'].replace(/.*url=/i, '');
			a.setAttribute( 'href', url );
			//a.setAttribute( 'target', 'blank' );
			a.appendChild( document.createTextNode( 'jump to ' + url ) )
			elm.appendChild( a );
			blocked.appendChild( elm );
		}
		document.documentElement.insertBefore( blocked, document.documentElement.firstChild );
		document.write( document.documentElement.outerHTML );
	}

})();