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Brad Werth authored
Bug 1561227 Part 1: Make nsDocumentViewer send a new event before setting full zoom levels on the pres contexts. r=emilio The PreFullZoomChange event gives listeners an opportunity to capture state before the viewport full zoom changes. Responsive Design Mode uses this to save and later restore the resolution of the RDM pane. Differential Revision: https://phabricator.services.mozilla.com/D48621 --HG-- extra : moz-landing-system : lando
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