Pocket was founded in 2007 by Nate Weiner to help people save interesting articles, videos and more from the web for later enjoyment. Once saved to Pocket, the list of content is visible on any device — phone, tablet or computer. It can be viewed while waiting in line, on the couch, during commutes or travel — even offline.
Please note that I'm in no way related nor affiliated to pocket or Mozilla, only an independant developer trying to bring something useful to the community.
I'm glad that you appreciate the addon, as it takes me a lot of my free time to develop it, fix bugs, answer support requests, well, everything you have to do when you work on this kind of projects! If you love it and want to help:
I thank you guys so much for your support and hope In My Pocket will keep on being useful to all of us!
The addon stores only the data needed to operate, mainly the data related to your pocket items and the settings you're configuring in the options page. All data displayed in the popup is stored in your browser and can only be accessed by yourself. I can't ever access any data of yours.
What about this "bug report" feature?
Bug report is an opt-in feature (meaning "it's not enabled by default) that you can enable to send me technical details when things go astray. These bug reports won't contain any identifiable data about your Pocket items or yourself (meaning that they don't contain items titles, urls, or information about your Pocket account). They will, however, contain some technical data for debugging purpose, such as your browser name and version.
Firefox recently introduced an "Extensions" button. By default, newly installed addons are moved in there to unclutter the toolbar: by default, InMyPocket icon won't be immediately visible after you installted the addon.
To change this, you must click the jigsaw icon at the right of your address bar, you'll find In My Pocket in there. Now, you can right-click the icon and then choose "Pin to toolbar" in the context menu: this will move the icon outside this menu and on the toolbar itself.
If you want to know more about this new Extensions button, you can check out this Firefox documentation page.