First of, I didn't pick 10 because it sounds like a good title, there just so happens to be 10! I am a big believer in saving time where ever possible, which is why I utilize all the FireFox add-ons available to me. This is a list I have curated over time, and every now and again I do come across others that help me so I will update this post with any new ones I discover. Some will be more specific to certain areas of SEO but mostly they will help you with link building and prospecting. Some I am sure you will have heard of before but I am also sure there will be some you wont of heard of. So without further ado lets go through them!
Ok so Flem doesn't exactly sound great does it? But for prospecting it is! It lets you browse through a list of URLs with ease. You simply copy a list of URLs to your clipboard and paste them into to the Flem toolbar. Then Flem lets you go from one URL to the next by simply clicking next/previous. It's great for prospecting a list of URLs you might of scraped. It is similar to the BuzzBar from BuzzStream in many respects. The add-on will let you remove URLs you don't want in the list and also let you export them. Much better than copying and pasting each URL you want to look at in a list!
The MozBar add-on is by the folks at Moz. It has a lot of useful features for when your "checking out" a website. You can easily view various metrics such as the Page Authority, Domain Authority and linking root domains to both the page and domain. These metrics can also be inserted into Google SERPs results for when your browsing which is handy. It also hosts a few other useful features such as highlighting followed links, nofollowed links, internal links, external links, keywords, displaying the server location and IP. There are also options for a more detailed view of the page elements, page attributes and link data.
PageRank for FireFox
Ok I don't think this one needs much explaining.. You don't want to be building links on sites that have PR na/ or 0. This simple add-on will add a little box in your toolbar which will display the PageRank of the page your are currently on and all open tabs if need be. Just note that PageRank isn't the only metric you should be looking at for the quality of a site. You should be looking at Domain Authority from Moz, Trust Flow from Majestic, website design, website engagement and the backlink profile of the site.
Majestic SEO Backlink Analyzer
I personally like to check the credibility of a domain from various sources which is why I use the Majestic add-on. When on a page you can click the Majestic icon and it will load up a table with lots of data for you. I mainly use it to check the Trust Flow of a website as often Domain Authority and PageRank can be faked. I also use use it to quickly check the anchor text for the domain to make sure there are no weird viagra or dodgy backlinks.
Find That Link
This add-on is by me and I have only just released it to so it is highly unlikely you have heard about it. This add-on will search a page for a link. The reason I built it was because I was doing a lot of unnatural backlink analysis and going through the backlinks manually can be a tedius job. One thing that was taking time was finding the link on the page. Often the pages were really long with lots of text and links so it could take sometime to look for the link. With this add-on you can just type in the root domain of the site you want to see links for, click next and it picks it up straight away for me or tells me there is not a link on the page for that domain.
So hopefully you've heard about broken link building. This add-on will check a page for any broken links for you so you can alert the website owner and try and get a link for yourself. Any links that it finds are broken it will highlight them in red, any links that are ok it will highlight them in green. To get the screen shot above I actually found several broken links on this BBC page.
Another time saver! Multilinks lets you open, copy or bookmark multiple links all at the same time. No longer do you have to copy and paste dozens of links from a page. All you have to do is right drag over some links on a page and the links will be copied to your clipboard. An example of when you would use this is when a website has a list of useful sites you want to save for future use. Much simplier than using XPath to scrape links!
LastPass Password Manager
Yes LastPass is primarily an add-on to manage your passwords which it is great at but it also can be used for automatically filling out forms on websites. You can set custom fields so you can highly tailor it to your requirements. It can be great for link removal projects where you are contacting many websites with similar information. One click all forms filled out!
If you've not heard of Boomerang for Gmail then your going to love it! The key features are scheduling emails to be sent later and follow up reminders. Both of these features are crucial for link building. For example you are link building for an Australian company on .com.au, you don't want to be sending emails when people are not in the office because of the time difference. Otherwise when they get in to work and have dozens of emails they might think I haven't got the time to respond to them and delete your email. So its best to schedule the email for about 11am local time with Boomerang. The second feature being reminded when someone doesn't respond is EXTREMELY valuable. You don't have to keep track of follow ups Boomerang does it for you. I find I get an extra 10%-30% success rate by doing follow up emails so if you don't DO.
If you have another add-on you think is highly useful that the above do not cover I'd love to here it and will add it to the list! Just comment below or shoot me an email at email@example.com.