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FF opens with 2 windows. 1 with home page, the other invisible. Both present in menu bar/window

  • 3 replies
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  • Last reply by FredMcD

Aaron
Aaron
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FF 59.0.2 on OS X El Capitan - it opens with no visible window. Going to the taskbar, under "Window" it shows the home page (opens when clicked on) and a phantom "Mozilla Firefox" page (clicking on it has no results). Other times FF opens with a tiny window in the bottom right of the screen, that can be dragged to full size. I erased the xulstore,json to no avail.

FF 59.0.2 on OS X El Capitan - it opens with no visible window. Going to the taskbar, under "Window" it shows the home page (opens when clicked on) and a phantom "Mozilla Firefox" page (clicking on it has no results). Other times FF opens with a tiny window in the bottom right of the screen, that can be dragged to full size. I erased the xulstore,json to no avail.

Chosen solution

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Type about:config<enter> in the address bar. If a warning screen comes up, press the I Accept the Risk button. At the top of the screen is a search bar. Type browser.startup.homepage

What is the value? Right-click and select Reset to restore its default value; about:home

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All Replies (3)

FredMcD
FredMcD
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There are several possibilities to this problem.

https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved 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/Profiles
  • Linux: *~/.mozilla/firefox/Profiles
  • Windows: %AppData%\Mozilla\Firefox\Profiles
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles
  • Windows XP: C:\Documents and Settings\<user>\Application Data
    \Mozilla\Firefox\Profiles\

Search for the above files. Then rename or delete them. Restart Firefox.

Aaron
Aaron Question owner
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Done that already, but tried again. Nothing has changed. Still small new window in bottom right and phantom window under "Window" menu. Thank you anyway — any other tip?

FredMcD
FredMcD
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Chosen Solution

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Type about:config<enter> in the address bar. If a warning screen comes up, press the I Accept the Risk button. At the top of the screen is a search bar. Type browser.startup.homepage

What is the value? Right-click and select Reset to restore its default value; about:home