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Firefox hangs / high CPU use when trying to open a local file

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  • 1 има този проблем
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I mean, that's it. If I try, through any means* to open a local HTML file or folder, that tab churns forever, spins up high CPU use, unresponsive to any form of interaction, and has to be killed using task manager.

  • Means tried include:
 - in FF: File, Open, select an HTML file.
 - in FF: use "file://c:/"
 - from Windows Explorer: context menu, "open with" -> Firefox
 - from Windows Explorer: drag HTML file to Firefox address bar

Windows 10 64-bit (does Win10 even have 32-bit?), FF 62.0 64-bit, middling late-model Dell laptop (16GB memory, i5-7300U, Intel graphics).

I mean, that's it. If I try, through any means* to open a local HTML file or folder, that tab churns forever, spins up high CPU use, unresponsive to any form of interaction, and has to be killed using task manager. * Means tried include: - in FF: File, Open, select an HTML file. - in FF: use "file://c:/" - from Windows Explorer: context menu, "open with" -> Firefox - from Windows Explorer: drag HTML file to Firefox address bar Windows 10 64-bit (does Win10 even have 32-bit?), FF 62.0 64-bit, middling late-model Dell laptop (16GB memory, i5-7300U, Intel graphics).