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    <p>Your example is similar to <a href="https://developer.mozilla.org/En/Using_workers_in_extensions" rel="nofollow">this firefox example</a> except for the loop inside the worker making multiple <strong>ajax</strong> requests. I'd be curious to know what is causing the failure. You might be hitting a limit on the number of concurrent <strong>ajax</strong> connections a single worker can process. </p> <p>Could you try moving the url for loop to the main gui thread: </p> <pre><code>for(var i = 0; i &lt; urls.length; i++){ worker.postMessage(urls[i]); } </code></pre> <p>and change your worker to just do a single <strong>ajax</strong> call at a time? </p> <pre><code>self.addEventListener('message', function(e){ try { var xhr=new XMLHttpRequest() xhr.open('GET', e.data, true); xhr.setRequestHeader('Accept', 'application/json'); xhr.send(null); xhr.onreadystatechange = function() { if (xhr.readyState == 4) { if (xhr.status == 200 || xhr.status == 304 || xhr.status ==0) { postMessage(xhr.responseText); } else { postMessage(xhr.status + xhr.responseText); throw xhr.status + xhr.responseText; } } }; } catch (e) { postMessage("ERROR:"+e.message); } }, false); </code></pre> <p>and see if that works? </p> <hr> <p>The <a href="https://developer.mozilla.org/en/Using_web_workers" rel="nofollow">mozilla example</a> has some error handlers that might reveal the problem. You might try adding in the main GUI thread: </p> <pre><code>worker.onerror = function(error) { dump("Worker error: " + error.message + "\n"); throw error; }; </code></pre> <p>and inside the worker:</p> <pre><code>function errorReceiver(event) { throw event.data; } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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