Can't change theme via firefox

edit

Hello folks:

Using: LibreOffice Version: 6.0.5.2 Build ID: 00m0(Build:2) CPU threads: 4; OS: Linux 4.12; UI render: default; VCL: kde4; Locale: en-US (en_US.UTF-8); Calc: group

With instructions from: https://help.libreoffice.org/Common/P... Tools - Options - LibreOffice - Personalization

[Quote:]

Own theme Choose this option to open the “Select Firefox Theme” dialog and pick your own.

Select Firefox Theme dialog This dialog allows you to install a specific theme or gives you a glimpse on other exciting themes from the Mozilla Firefox themes website.

Custom Search Type or paste the URL of the theme’s webpage. To get the URL, navigate with your browser to the theme’s webpage and copy the URL displayed in the navigation bar of your browser. Then paste it in the dialog’s text box. Click the Search button to download and install it in LibreOffice.

[Unquote]

BUT....

When I put a url https://addons.mozilla.org/en-US/fire... into the dialog and click "Go", it only does this:

[Quote:]

Error: Cannot open https://addons.mozilla.org/en-US/fire..., please try again later.

[Unquote]

This is all it ever does, and doesn't seem to matter what URL is in the dialog.

What am I missing?

openSUSE-LEAP 15.0 KDE-x86_64 | Gigabyte GA-F2A88X-D3HP (rev. 1.0) | 16GB DDR3-1866 AMD 880G + SB850 Chipset | ATI Radeon HD 4250 (DirectX10.1) sda=80GB Ext4 | sdb&sdc=500GB Ext4 | sdd=1T Ext4 | Firefox 60.0.2 | Thunderbird 52.8.0