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.

Hello FredMcD,

I have deleted all files as you have noticed, but firefox did not change for the window-size of about:preferences#security stored login information show passwords. I want to mention that the windows of windows itself can be changed in window-size. My request for this problem issue only depends on about:preferences#security stored login information show passwords.

kind regards pemigabo123

Hi, would you mind taking a screenshot of the small window size? You can censor or erase the logins using Paint or a image editor of your choice. Then attach it to your post using the "Add Images" section under the reply box. Just trying to see how bad this issue is. Thanks!

Also, 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?

Hello Noah_SUMO,

thank you for your message.

For how long do I have the chance to reply to your answer ? When will be my question closed for this technical issue ?

best regards pemigabo123

Hello FredMcD,

I do always start mozilla firefox in safe mode if a technical issue would be caused. As same as here in this technical issue I have had started mozilla firefox in safe mode, but it did not change anything.

path: about:preferences/settings/security/saved login information and then open saved login information with passwords

This opened window could not be changed in any other size no matter you would want to do. You can go to the edge of every window side and there is no double arrow visible to change the window size. The window size for this opened window is rigid and unchangeable. In earlier mozilla firefox versions this technical issue have not been caused, and the design of the window has been looking not like this and the window size could have been changed for all four edges for a larger size.

best regards pemigabo123

pemigabo123 said

When will be my question closed for this technical issue ?

This will remain open until you close it.

Noah_SUMO said

would you mind taking a screenshot of the small window

Have you tried grabbing a corner and pulling it away from the window?

Hello FredMcD,

many thanks for your message.

I am so sorry because of the following issue, that trying grabbing a corner and pulling it away from the window is only possible on the right corner below, not on any other corner of the window or on the edges of the window. A suggestion: The visible points for grabbing a corner and pulling it away from the window should be more visible.

best regards pemigabo123

Can you make the window bigger doing that?

Hello FredMcD,

many thanks for your message.

Yes, through the corner right below where the grabbing points are, the window size can be changed for the whole window. It should be possible now to change the window size nearly for the whole screen. Thank you for your support and your patience.

best regards pemigabo123

Glad to help. Safe Surfing.