browser(firefox): do not double-attach session to the same target #4027
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This should unblock the roll to r1177. References microsoft#3995
dgozman
approved these changes
Oct 1, 2020
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We currently might double-attach to the target in
BrowserHandlersince we iterate over all targets, and then subscribe to the additional event when target is getting initialized.This patch fixes this race condition and should unblock the roll to r1177.
References #3995