Diigo is great. Keeps your bookmarks, highlights and notes. Rated 5 out of 5 stars

I use it to keep all my bookmarks acroos web browsers, operating systems, and computers. You have both the web and the plug in interfaces, making it super versatile for all your things. I use it along with tab cloud. Diigo gives you the ability to highlight the important parts of the web pages and keep notes. Great for research tasks. You can search for stuff in your history and library. Need more? Word of advise, use public comments carefully. If you try report a website or scam site using diigo, it will come out as a negaive message and they will actually disable your profile for making any future public postings. You can still do private notes but that defeats the purspose of reporting a site publicly. Hard to contact those guys fix back your profile.

Need oflline mode (without registration) Rated 3 out of 5 stars

I just wont to try this extension,
Annotate some pages for myself on single PC,
I don't wont my annotations to be stored online.

Awesome Tool Rated 5 out of 5 stars

You can do many great things.
One place to collect all information and then read, create outlines etc.
Recommended for everyone.

One of the best tools on the internet Rated 3 out of 5 stars

My Diigo Toolbar and all the icons are frozen. I tell them about the problems and they say to try Chrome which they have done more work on. Sorry, I have a lot of other add-ons which are only on Firefox: the original platform Diigo was developed for. This add-on hasn't been updated in years during which time they've chased markets developing lots of half baked apps. None of them are very good nor are they of use to me. I've been loyal, and pay for their premium product. Why haven't they been loyal back?

Regardless, the basic idea and functionality is one of the best ideas ever. I love the ability to highlight and create a personal database. I wish them all the luck, I just wish they were better at customer service.

Still the best, misses "google search enrichment" Rated 4 out of 5 stars

Diigo is today the best bookmarking application, I tag everything with this but actual reads, for which I use Pocket.

What I really need would be that the Firefox plugin will enrich my google search page with actual results from my Diigo. That would probably also increase my engagement with Diigo.

Not installing, noway! Rated 1 out of 5 stars

Opting away after learning how aggressively it collects your private data:

http://www.thesafemac.com/screenshot-extension-injects-ads/
https://mig5.net/content/awesome-screenshot-and-niki-bot

Useful, but not perfect Rated 3 out of 5 stars

I like Diigo, but this toolbar is far less good than the Chrome's one. Some feature are buggy. Needs more work!

To answer other comments: there's no problem to log in, and it's possible to hide it.

This user has a previous review of this add-on.

Rated 4 out of 5 stars

HACK: How can I switch yellow color to for example orange OR darker yellow? Yellow highlight and white background = not very visible.

This user has 9 previous reviews of this add-on.

Rated 5 out of 5 stars

Exceptional add on, but has stopped working as of early December 2014, as in you can't log in anymore to use it

Cant synchronize with delicious Rated 2 out of 5 stars

I am happy use diigo for one year, I write this review to say thank you.

But I will not use any more because it no longer support to synchonize with delicious as a free service.

Where is the freedom? Rated 1 out of 5 stars

DIIGO TOOLBAR IS IMPOSSIBLE TO HIDE.

No problems with Diigo Rated 5 out of 5 stars

Always updated to latest browser versions. No complaints here.

Exceeds my expectations Rated 5 out of 5 stars

Compared to all other social bookmarking services this is the most useful one, very easy to use! I wish I would have found it years before!

BREAKS TOOLBAR CUSTOMIZATION !!! Rated 1 out of 5 stars

WAS USING THIS FOR MANY YEARS.
LATEST VERSION BREAKS TOOLBAR CUSTOMIZATION ON FIREFOX > 29
DIIGO TOOLBAR IS IMPOSSIBLE TO HIDE.

Useful Rated 5 out of 5 stars

One of the most useful extension. It lets you keep track of your web navigation in several ways, plus adding social features. The best in this field.

Nice Toolbar Add-on and Highly Useful Rated 5 out of 5 stars

The Diigo toolbar add-on really works nice for me. It has a lot of useful options. I generally don't display the toolbar in my browser to save on screen real estate. The drop down button is highly useful. It allows me to quickly create a bookmark with all the tags and descriptions I want and do a quick search for the bookmarks I saved.

There are a couple of feature I would like to see in future versions. One, add a plus/minus sign next to the search results in the sidebar to let me toggle the title/description of the URL. Two, let me create custom short-cut key to toggle the side-bar, toolbar and "Bookmark this page" box.

Over Priced, Missing Features, Data Mining Rated 3 out of 5 stars

This is a nice app, However its way over priced for what it does.
- The Stickynotes are visible on all root web address, and not specific to the one you chose - that should be my option. Also, theres no way to Edit a Sticky Note except in Diigo's My Library, its laborious and slow, APPs are supposed to be useful and FAST.
- All the Notes Do Not remain my private property on my HDD, but are held elsewhere on Diigo's Servers - Once Again this should be my option.
- I look forward to these fixes, else I dont see it being much use for me.

Rated 5 out of 5 stars

Truly brilliant - the ultimate web clipping/annotating/highlighting and organising tool. Great for compiling materials for blogs, and for research notes. Thank you.

Rated 5 out of 5 stars

An excellent extension, better than its Chrome counterpart for the dedicated Diigoist. Diigo's Android coverage is still horrible, however, and this extension could certainly benefit from a port that works in the mobile versions of Firefox used in iOS and Android.

Rated 4 out of 5 stars

this addon works great, springpad could learn a lot form this one :)