Missing E adds functionality and tools for navigating, posting and socializing on the the popular Tumblr micro-blogging platform. Check out what Missing E has to offer:

Ask Tweaks: make it easier to send asks and manage messages in your inbox.
Bookmarker: mark your place in the dashboard to go back later.
Dash links to tabs: open links in your dashboard in new tabs. Never lose your place in the dashboard!
Magnifier: enlarge photos without leaving the dashboard.
Post crushes: automatically create posts of your Tumblr crushes.
Reblog yourself: improve reblogging functionality to your own Tumblr.
Safe dash: hide images in Tumblr posts until you hover your mouse over them (in case they’re unsafe).
Timestamps: add the date and time to a post, message or submission.
Better reblogs: reblog faster and more productively.
Dashboard tweaks: customize your dashboard interface for easier reading and blogging.
Goto dash post: jump directly from a post permalink page to its position on the dashboard.
Mass editor tweaks: select multiple posts (by type, number) in the Tumblr Mass Editor.
Posting tweaks: more functions and automatic actions for creating or editing posts.
Reply replies: automatically create reply posts for responding to post comments and other notes.
Sidebar tweaks: tweak your Tumblr sidebar and add useful stuff to it.

Click HERE to install it! 
* Check the FAQ if you have any questions or problems.
** Only for Chrome, Firefox and Safari.