I have created a TYPO3 template extension using the following method: 1.1 via Extension Manager Open the module "Extension" in the TYPO3 Backend and search for the mask Extension. Click on the configure icon at the end of the row. Now you should be able to change the settings.
Changes are stored in typo3conf/LocalConfiguration.php.
Facing the following problems:
1.We created the folder/extension as mentioned. While installing this extension we have to change Mask back-end configuration. This is not working.
2.Page tree contents are not properly imported i.e. all page contents are missing.
Please let me know if you need further details.
We have a working configuration where we stored the full mask-configuration as part of our site-extension.
As designed you need to configure mask before you start to define any CEs, so that all CE definitions are stored in the correct folders.
For the rendering you also need to include the static template of
ext:mask
.Our configuration is:

This configuration is stored in
typo3conf/LocalConfiguration.php
as there goes every configuration done in the extension manager.