README: Mention sandboxing

README.md

@@ -8,12 +8,12 @@ Currently, this allows you search all indexed pdfs and take a look at the pages
 Coming soon™
 
 
-## Goals
+## Goals and principles
  * **Find & Preview**. Instead of merely telling you where your search phrase has been found, it should also render the corresponding portion/pages of the documents and highlight the searched words.
  * **No daemons**. As other solutions are prone to have annoying daemons running that eat system resources away, this solution should make do without daemons if possible.
- * **Easy setup**. Similiarly, there should be no need for heavy-weight databases. Instead, this solution tries to squeeze out the most from simple approaches. In particular, it relies on sqlite. 
+ * **Easy setup**. Similiarly, there should be no need for heavy-weight databases. Instead, this solution tries to squeeze out the most from simple approaches. In particular, it relies on sqlite.
  * **GUI & CLI**. Provide CLI interfaces and GUI interfaces
-
+ * **Sandboxing**. As reading and rendering lots of formats naturally opens the door for security bugs, those tasks are offloaded to small, sandboxed sub-processes to mitigate the effect of exploited vulnerabilities.
 
 ## Build
 ### Ubuntu 21.04