status-firefox55: --- → affected
status-firefox57: affected → ---
Possible duplicate of #1341947 ?
Also, don't know what's meant by overflow panel? I click nothing and this event is fired once after each mouse out from browser's action button icon with a popup defined. As I'm developing a WebExtension based add-on, I am running the web-ext command, which creates a clean profile on every use. The error occurs regardless. If I do not define a popup anywhere, either in manifest.json or in a background script with browser.browserAction.setPopup(), then I do not receive the error. Even if I use only a plain html popup (link and script tags commented out), I receive the error. Even if the browser is maximixed, taking up most of the screen, or made very narrow, I receive the error.
Status: NEW → RESOLVED
Last Resolved: 10 months ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1341947
You need to log in before you can comment on or make changes to this bug.