Trello not loading (CDN blocked)
Categories
(Core :: Networking, defect)
Tracking
()
People
(Reporter: david, Unassigned)
References
Details
Attachments
(1 file)
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19.81 KB,
image/png
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Details |
firefox_ONAbd4V9QW.png
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0
Steps to reproduce:
Opened a trello board, also tried to clear cache and cookies to see if this fixes the issue.
Actual results:
All requests from a.trellocdn.com do not load (they got blocked from Firefox)
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Comment 1•4 years ago
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Why did you mark this as a security sensitive bug (exploit / vulnerability) ?
That was a mistake - my fault, sorry. But unfortunately I can't change this to normal.
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Updated•4 years ago
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Updated•4 years ago
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Comment 3•4 years ago
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Christoph, do you maybe know what can cause this?
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Comment 4•4 years ago
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(In reply to Dragana Damjanovic [:dragana] from comment #3)
Christoph, do you maybe know what can cause this?
Hey David, thanks for reporting. Unfortunately i can not reproduce the problem on my end (as of now). Could you maybe share some more details on the exact steps to reproduce the problem? Have you any addons installed? Could you maybe paste the output from your web console and also browser console? (FWIW, you find the console in the hamburger menu on the right hand side under Web Developer and then Web Console and Browser Console.
Happy to take another look - thanks!
Hey Christoph! Thanks for the great hint with add-ons, unfortunately I completely forgot to try that. The add-ons which caused the problems was "Alexa Traffic Rank" (https://www.alexa.com/toolbar/policy). When I disabled it, Trello started to load again. Then I enabled it again and it seems to work so far.
Crazy, that the add-on blocked requests from Trello, preventing it to load. So I think there might be an issue with this specific add-on. I forgot to paste the output from the console when Trello didn't load, sorry! But I'll post it later if this happens again.
Thanks for your fast help!
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Comment 6•4 years ago
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I'll mark this as WFM for now based on comment #5, though I'm a little surprised - from bug 1555057, shouldn't we be showing the add-on doing the blocking in the network monitor?
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Comment 7•4 years ago
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(In reply to :Gijs (he/him) from comment #6)
I'll mark this as WFM for now based on comment #5, though I'm a little surprised - from bug 1555057, shouldn't we be showing the add-on doing the blocking in the network monitor?
Honza, is there something to follow up on? The problem is that an add-on blocked loading resources but end users couldn't not easily identify the problem. Also what Gijs mentioned around Bug 1555057 - thanks!
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Comment 8•4 years ago
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(In reply to david from comment #5)
Hey Christoph! Thanks for the great hint with add-ons, unfortunately I completely forgot to try that. The add-ons which caused the problems was "Alexa Traffic Rank" (https://www.alexa.com/toolbar/policy). When I disabled it, Trello started to load again. Then I enabled it again and it seems to work so far.
Thanks for reporting this!
David, you are talking about "Alexa Traffic Rank", but the link (https://www.alexa.com/toolbar/policy) is pointing to "Alexa Toolbar for Firefox". Is this the extension?
I am seeing "Alexa Traffic Rank" for Chrome here: https://chrome.google.com/webstore/detail/alexa-traffic-rank/cknebhggccemgcnbidipinkifmmegdel?hl=en
But on Firefox add-ons site, there is only "Alexa Rank" https://addons.mozilla.org/en-US/firefox/addon/minimalist-alexa-rank/
Which one could I test? (and check that the Network panel properly shows name of the extension that is blocking some requests)
Honza
(In reply to Jan Honza Odvarko [:Honza] (always need-info? me) from comment #8)
(In reply to david from comment #5)
Hey Christoph! Thanks for the great hint with add-ons, unfortunately I completely forgot to try that. The add-ons which caused the problems was "Alexa Traffic Rank" (https://www.alexa.com/toolbar/policy). When I disabled it, Trello started to load again. Then I enabled it again and it seems to work so far.
Thanks for reporting this!
David, you are talking about "Alexa Traffic Rank", but the link (https://www.alexa.com/toolbar/policy) is pointing to "Alexa Toolbar for Firefox". Is this the extension?
I am seeing "Alexa Traffic Rank" for Chrome here: https://chrome.google.com/webstore/detail/alexa-traffic-rank/cknebhggccemgcnbidipinkifmmegdel?hl=en
But on Firefox add-ons site, there is only "Alexa Rank" https://addons.mozilla.org/en-US/firefox/addon/minimalist-alexa-rank/
Which one could I test? (and check that the Network panel properly shows name of the extension that is blocking some requests)
Honza
Hey Honza! Oh sorry, a mistake - yes, the right one is the "Alexa Toolbar for Firefox" on this link: https://www.alexa.com/toolbar/policy - this add-on did cause all the problems. After installing, it has gets the name "Alexa Traffic Rank".
The "Alexa Rank" from the Firefox add-ons site is not the official one, but works perfectly.
Thank you for your efforts!
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Comment 10•4 years ago
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Great, thanks. One more question, what exact URL should I load to reproduce the original problem?
Any instructions?
Honza
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Comment 11•4 years ago
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A private Trello board, so I can't send you the link, but the bug occurs on the Trello demo boards too, like here: https://trello.com/b/s9lL7n85/blog-editorial-calendar (from https://trello.com/inspiringboards).
Another crazy bug when you have Twitter, two accounts logged in and "Alexa Toolbar for Firefox" activated: open https://twitter.com/home, log in to your account, add another account with clicking "add existing account" on the left bottom (where your profile name is), log in to another account (if you have one), enable "Alexa Toolbar for Firefox" from above and try to switch the accounts. Won't work.
I hope this helps!
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Comment 12•4 years ago
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Thanks for all the info!
I was able to repro the issue and I created a bug for it : Bug 1664784 - Extension name on available for blocked requests
Let's continue discussion there.
Honza
Description
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