Open Bug 1417721 Opened 3 years ago Updated 1 month ago
.Tab .fav Icon Url intermittently returns undefined even though favicon is showing in tab
This shows up eg, doing tabs.query. I have had the opportunity to verify this does actually happen, though it is intermittent and I'm unable to give an STR. This includes favicons served by http(s) URLs. I have witnessed this with both discarded and loaded tabs.
Here is an extension used for polling the tabs in the current window and printing out the favIconUrl's to the console. Just click the browserAction icon.
Bulk move of bugs per https://bugzilla.mozilla.org/show_bug.cgi?id=1483958
Component: Untriaged → General
I am running into the same problem with my extension "IdentFavIcon Quantum" (https://addons.mozilla.org/firefox/addon/identfavicon-quantum/), and I'm told that the Favioli addon has a similar issue in Firefox. The extension sometimes doesn't detect that the page already has a favicon and so overrides it. This appears to be completely arbitrary; any given tab may or may not have the favIconUrl set. A user reports (https://github.com/wolfgang42/identfavicon-quantum/issues/2#issuecomment-435579105)--and I tend to agree--that the problem has gotten worse since Firefox 63. I'm considering uninstalling my own addon since this is causing too much confusion.
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