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            <b><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - [GTK] Slack.com is not working with WebkitGTK 2.10.0"
   href="https://bugs.webkit.org/show_bug.cgi?id=149551#c10">Comment # 10</a>
              on <a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - [GTK] Slack.com is not working with WebkitGTK 2.10.0"
   href="https://bugs.webkit.org/show_bug.cgi?id=149551">bug 149551</a>
              from <span class="vcard"><a class="email" href="mailto:mcatanzaro&#64;igalia.com" title="Michael Catanzaro &lt;mcatanzaro&#64;igalia.com&gt;"> <span class="fn">Michael Catanzaro</span></a>
</span></b>
        <pre>Asking the Slack developers to look at it would help. We're not going to debug their website for them.

This looks bad:

[Warning] Unhandled rejection _addBinding&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:15607">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:15607</a> (rollup-core_required_libs.js, line 24)
_registerListener&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:15424">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:15424</a>
add&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:16071">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:11:16071</a>
onStart&#64;<a href="https://h2.slack-edge.com/33e0d/js/rollup-client.js:4:30182">https://h2.slack-edge.com/33e0d/js/rollup-client.js:4:30182</a>
_callOnStarts&#64;<a href="https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:7715">https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:7715</a>
_onTemplatesLoaded&#64;<a href="https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:7184">https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:7184</a>
<a href="https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:4710">https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:4710</a>
cancellationExecute&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:23:24553">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:23:24553</a>
_resolveFromExecutor&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:25:10810">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:25:10810</a>
Promise&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:25:2167">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:25:2167</a>
loadTemplates&#64;<a href="https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:4538">https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:4538</a>
_onDOMReady&#64;<a href="https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:5511">https://h2.slack-edge.com/4f1f/js/rollup-core_required_ts.js:2:5511</a>
fire&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:10822">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:10822</a>
fireWith&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:12106">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:12106</a>
ready&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:15007">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:15007</a>
completed&#64;<a href="https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:15280">https://h2.slack-edge.com/3e1f/js/rollup-core_required_libs.js:2:15280</a>

The log also shows some serious performance issues:

[Error] 2016/7/18 11:47:17.478  view.onStart() took 96.81ms, and that's WAY too long! Please make lazy any expensive DOM work etc you're doing
    _console (rollup-core_required_ts.js:1:9133)
    error (rollup-core_required_ts.js:1:3156)
    _callOnStarts (rollup-core_required_ts.js:2:7969)
    _onTemplatesLoaded (rollup-core_required_ts.js:2:7185)
    (anonymous function) (rollup-core_required_ts.js:2:4711)
    cancellationExecute (rollup-core_required_libs.js:23:24554)
    _resolveFromExecutor (rollup-core_required_libs.js:25:10811)
    Promise (rollup-core_required_libs.js:25:2168)
    loadTemplates (rollup-core_required_ts.js:2:4539)
    _onDOMReady (rollup-core_required_ts.js:2:5512)
    fire (rollup-core_required_libs.js:2:10823)
    fireWith (rollup-core_required_libs.js:2:12107)
    ready (rollup-core_required_libs.js:2:15008)
    completed (rollup-core_required_libs.js:2:15281)</pre>
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