You are welcome to share if you know more amazing firefox add-ons that will save time which our readers/viewers may like.
Read It Later

It lets you save articles and webpages so you can read them later, even when you’re offline. Now the internet is your bitch. Firefox add-on
Chunkit

This add-on is so badass, that if search engines made a superhero movie, this would be the Batman. Basically, you get to search any website with sonar vision and see through all the links at once. Firefox add-on
Remove Cookie(s) From Site

So, you visited a website you’re not too proud of, but you don’t want to delete your cookies or you will lose your progress on Defend Your Castle. Well now you can have your cookie and eat it too. Firefox add-on

YourWebsiteValue

This is your childhood cardboard fort of Firefox add-ons. Absolutely useless, but very… very cool. Basically this shows you the estimated worth of most websites. Who knows how accurate and useful it really is, but hey, did you really think your cool fort could actually keep the girls out? Firefox add-on
TryAgain

This is the Drunk Uncle at the bar that won’t stop hitting on the ladies of Firefox add-ons. TryAgain will keep trying to load a webpage when the server is not found, and it won’t stop till it gets what it wants. Firefox add-on
IMDb Preview

IMDb suffers from Wikipedia syndrome. How many times have you started on Pee-wee’s Big Adventure and ended up on The Shining? Too many damn times. However, with this add-on you get to preview links on IMDb and see snip-bits of information without leaving the page. Wait, why doesn’t Wiki have this?
Aging Tabs

What’s your record? 20 tabs open at once? Well Aging tabs will help you realize your laziness by making unused tabs fade and change colors with age. Although, it would be cooler if they made the tabs blow up in a fiery explosion instead.
Tab Mix Plus

This is the ultimate tab collection, greatest hits volume, 0.3.6. It has such classics as duplicating tabs, controlling tab focus, tab clicking options, and many of your other favorite hits. And if you download in the next 15 minutes we will throw in “undo closed tabs and windows!” Firefox add-on
CoolPreviews

Preview how a webpage page looks like before you actually click on the link. So now you can see how unorganized, useless, and ugly the website is before you commit your precious time to it. Dating really needs a tool like this. Firefox add-on
You can also take a look at 5 must have firefox add-ons for social media addicts I found interesting on the other website.