**EDIT** And thanks to the developer for your rapid response to my review :-) In fact, I was just having a problem with a bookmark that would not delete and would not sync to FF bookmarks. Your hint about the "Reload from FF API" button proved to be the solution to that problem! By refreshing the BSP2 bookmark list, it cleared that problematic bookmark. Also thanks for your point about privacy and cookies. That has led me to uncheck the option I had previously checked.
I really, really like this add-on which I discovered yesterday.
I depend on my Firefox bookmarks and now I can do what I couldn't previously do in Firefox: 1. Search for a bookmark folder 2. Search for a bookmark and INSTANTLY see which folder it is in (this is also a way for me to find other similar bookmarks by locating their folder) 3. The above point is particularly useful for many of my bookmarks which unfortunately don't show a blue star in the navigation bar (an FF bug?). That makes it virtually impossible for me to find their folder without this excellent add-on (I have about 6500 bookmarks so you can well imagine the problem!)
What is more, Bookmarks Search Plus seems to auto-sync with Firefox Bookmarks (presumably, this will be because they are both using the same bookmarks list?).
Doubtless, I will go on to discover other useful features of this add-on, but the above-mentioned already fulfil key functions I need, that are lacking in Firefox's otherwise (for me) excellent bookmarks.
Thanks to the developer for an excellent tool!!
And by the way, for the previous reviewer, I think you are wrong about favicons. I had a similar problem, and so went to the add-ons page, clicked the Options button for Bookmarks Search Plus, and ticked "Include cookies to increase background favicon retrieval success rate" (this is right at the bottom of its Options page) and that seemed to do the trick for me. Hope that helps!
Yes BSP2 is getting notified by FF each time something is changing in bookmarks. So this is auto-syncing, and the FF bookmark list is the unique source. It can happen in some conditions (like disabling the addon for some time) that the sync is lost, hence the "Reload from FF API" button in the options page.
And yes favicon are fetched. That does not start immediately on first install in order to let FF stabilize first. Then the option you mention increases the number of favicon succesfully fetched. I created that option and set it to false by default for people who do care about privacy and cookies.