Access your Firefox Bookmarks in Roundcube
With this plugin you can access your Browsers Bookmarks inside Roundcube. You can use this with 2 different ways. First, you can use Firefox to automatically save a bookmarks.htm every time you close the browser and upload this to your Roundcube installation. The other, more simple way is it to use the companion Browser extension. There is one extension for Firefox available, released officially at AMO (Firefox AddOns) and the a Chrome version, which is not officially in the Chrome Store, since a fee of 5$ is needed to publish a free exentsion. However you can get the Chrome variant at my Github repository in the Chrome branch.
Browser Support This plugins works also with Bookmark Export's from Firefox, Internet Explorer and Google Chrome Browser as html file. As an alternative you could use one of the 2 AddOn Extension i mentioned earlier. In both browsers, the exported bookmark file seems to be compatible with this plugin. However, since I didn't use Internet Explorer or Chrome, I can't tell you if there is a way to export these bookmarks automatically. Maybe there are scripts, add-ons or advanced settings. The only reasonably comfortable way I found is in Firefox. This is described in detail in the FAQ.