First of all I want to thank the BBlog developers for their awesome work over the years. Their plugin made huge improvements on the Battlelog platform and made playing the games using Battlelog way more enjoyable for many.
While development may have stopped, the BBlog developers made their work and plugins available on GitHub. For Chrome users the BBlog plugin is still available in the Chrome plugin store.
Firefox users can download the plugin file here and then install it manually. This can be done by pressing the button with 3 stripes in the right corner of your Firefox browser (picture) --> Clicking the Add-ons tab --> Clicking the small gear icon (picture) --> selecting the .xpi file you just downloaded in the explorer window that pops-up.
What can I do with BBlog?
You can install a plugin that shows you the true amount of players on a server!
After installing the browser plugin and restarting the browser, go to
Battlelog and hoover your mouse over the new slider that appears on the
left side of your screen.
Then click the Plugin Gallery button.
After switching the plugin on, refresh your browser with the F5 key.
There are quite a few more extensions available for BBlog in the Plugin Gallery. I suggest you to try them out and see for yourself :)