Dupe of Bug 613714?
I think the responsiveness issue comes from having to load the SVG filter to get the blur effect on the page behind the alert.
@Wes: I think the issue isn't loading SVG, but applying the blur effect. Convolution is slow (isn't it?) But that's handled by that bug too. Thus it is a dupe.
It's slow also when you switch to tab with alert, not only when alert is shown for the first time
There are at least 2 separate issues (first prompt slow to show blur effect, slowness in switching back to a tab with prompt). Let's deal with it all in bug 613714.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 613714
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