We'd like to let you know that as of February 2020 we are discontinuing the development of the Tag Manager plugin (xtag.) The plugin allowed authorized users to insert HTML, CSS or Javascript code to any Roundcube page without editing the source code files. Although in theory it was an interesting idea, the demand for this plugin was minimal. Those who deploy their own installations of Roundcube and want to modify the looks of their webmail are for the most part knowledgable enough to edit the source files, and those who aren't, run the risk of breaking their webmail by using the Tag Manager improperly.
The latest release of the Tag Manger plugin will remain functional for Roundcube 1.3.x, but we will not be issuing any new upgrades to this plugin in the future.
