Bug#723590: iceweasel: after some time, the tooltip frame becomes too large

[Vincent Lefevre]

Control: found -1 24.3.0esr-1

IIRC, this problem didn't occur for a few months. But just after
upgrading to 24.3.0esr-1, it reappeared.

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Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)