[Bug 1798999] Re: firefox windows are black in Ubuntu 18.10

[Scott M]

Happening to me also. Intel graphics. I've removed everything and reinstalled it. Same.
But the Firefox Snap works fine. So do Chromium and Opera.
Only since the upgrade to 18.10 64bit

----code

[GFX1-]: Failed to lock new back buffer.
[Parent 2199, Main Thread] WARNING: failed to open shm: Permission denied: file /build/firefox-MtV3KQ/firefox-63.0+build1/ipc/chromium/src/base/shared_memory_posix.cc, line 129

----/code

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Title:
  firefox windows are black in Ubuntu 18.10

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