LinkRemark-0.3 version has only minor changes applicable to Firefox since 0.2.1
- More flexible handling of DOI URIs.
- More configuration options for org-protocol export method. New settings allow to launch external scheme handler without preview tab on privileged pages and experimental feature to detect problems with desktop-wide org-protocol handler may be enabled (it is better to switch it off when debugging is finished).
- Pre-selected export format and methods on preview and debug info page are adjusted. For some combination of values behavior was confusing.

The real reason of update is to keep version in sync with the one published in Chrome Web Store.