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Why, on macOS Sierra, is the download-window-popup, so small, that I can't select options, within-it ?

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I just upgraded to Sierra v10.12, on my mid-2015-15-inch-Retina-MacBook_Pro, and Firefox has a bad flaw that cropped-up -- after a download has completed, it pops-up a window to either save, or invoke an application, but the window is so small, that hardly any options can be selected, within-it .

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All Replies (10)

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You may have corrupt xulstore.json or Localstore.rdf file.

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/
  • Linux: *~/.mozilla/firefox/
  • Windows: %AppData%\Mozilla\Firefox\
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\

Locate the above files. Then rename or delete them. Restart Firefox.

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I followed the procedure that you suggested, but it didn't work .

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Start Firefox in Safe Mode {web Link} by holding down the <Shift>
key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

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After your original post, another Sierra user reported this same problem when using two screens with different resolutions. Does this match your experience:

Download window too small, can't be expanded (unsolved)

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Yes, I, too, have multiple monitors, with differing resolutions ( I used a Thunderbolt-to-full-size-DVI adapter to hook-up an old Apple 2005 Cinema Display, via my Thunderbolt 2 port ) .

Firefox's windows have never reliably restored themselves in the correct position on my multiple monitors, when Firefox is brought-up .

Would I lose my Firefox's "history", if I were to delete its main ".plist" Preferences file, like suggested in the other article ?

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I'm not a fan of multiple monitors for many reasons, but the confusion about where things open is a big part of it.

The .plist file stores Mac-specific settings. Firefox stores its history in the places.sqlite file in your profile folder, near where you removed xulstore.json. Removing the .plist file should not affect places.sqlite.

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O.K. -- I deleted the .plist file, but it hasn't recreated it, yet ! There was also a : org.mozilla.firefox.plist.lockfile , which I didn't touch . It may have solved the problem .

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Here is the diagnosis:

If you move the Firefox window, that requests the download, to the original Retina's screen, you get a normal pop-up window, for the download selection dialog .

However, if you move the Firefox window to an alternate resolution, and request the download, you get a shrunken pop-up window, for the download selection dialog !

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This is STILL not fixed, under macOS Sierra v10.12.2, and Firefox v50.1.0 !

I'm using a mid-2015_15-inch_Retina_MacBook-Pro .

I'm using a Thunderbolt-2/Thunderbolt-1_to_Full-size-DVI_adapter, to connect my 2005-Apple-Cinema-display, as a secondary monitor .

The secondary monitor is virtually, off-to-the-right, of my MacBook_Pro's Retina's laptop screen .

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Please check your Inbox at the top of the page for the PM I just sent to you concerning this issue.