How to install LibreOffice extensions
Download an extension from LibreOffice Extension Center
You install extensions on your own risk! Currently the extensions from that site have not been reviewed systematically! You can not expect that all OOo extensions also will work with Libreoffice.
Open LibreOffice and go to▸
In Extension Manager dialog, click Add....
In Add Extension(s) dialog, find the extension file. The LibreOffice extension files have the OXT file type.
Select the extension and click Open to start the installation.
If this extension it is already installed, you'll be prompted to press OK to confirm whether to overwrite the current version by the new one, or press Cancel to stop the installation.
After, you are asked whether to install the extension only for your user or for all users (this question only will be appear if you have system administrator rights. If you don't have system administrator rights, ignore this step).
If you choose Only for me option, the extension is installed only for your user (the extension will be stored in your user profile and other users will not have access to it). If you choose For all users, you must have system administrator rights. In this case, the extension is installed in LibreOffice installation directory and will be available for all users. In general, choose Only for me, that does not require administration rights on the operating system.
The next step is to verify the extension license agreement.
Use Scroll down button to read the license agreement. At the end of license text, the Accept button will be enabled.
Click Accept to proceed the installation.
After the installation, the extension will appear in the list of installed extensions.
To complete the procedure, click Close to close the dialog and, after, close LibreOffice, including quickstarter. The quickstarter, when enabled, is on the right corner of the program bar and can be closed with the right mouse button.
Next time you open LibreOffice, the extension should be ready for use.
Note: the OXT file type is linked to LibreOffice. Double click on the OXT file opens the Extension Manager and starts the installation.
Note 2: at Extension Manager dialog, if you click on Get more extensions online link, the LibreOffice Extension Center will be opened.