20 must-use Mozilla Firefox add-ons and extensions for freelancers

Read on top 20 Mozilla Firefox add-ons and extensions you need to know if you want to polish your freelancing skills and get to a new level of your personal productivity.

Mozilla Firefox add-ons
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Mozilla Firefox, being a firm believer in privacy as the basis of the healthy internet, gets access to the hearts of 198 million active users every month.

It operates as a non-profit organization that stands for fail-proof protection of users' personal data. Keeping your work secure against any privacy risks is in total alignment with the core of freelancers' jobs.

Below is the list of 20 amazing Firefox add-ons and extensions you might find useful for performing your freelancing tasks.

Text MultiCopy

It enables multiple times text saving to the clipboard, which makes it a useful tool for collecting references that make your content reader-friendly and more authoritative.

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As a side (but important) note, this add-on does not contain any tracking or privacy infringement.
In case you restart your computer, it will not violate the parameters of the saved data. In addition, this add-on has the option to check and edit the information you saved. For collecting the saved data and arranging it as a file, there is a special Export option too.

What makes it worth trying? This add-on can save copied data regardless of Firefox browser working status, and it makes it handy, to say the least.

Font Finder

This Firefox extension will make the full inspection of the font on any given page an easily accomplished mission: now you can get CSS styles of the selected element in a click.

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What makes it worth trying? This add-on is highly practical. In particular, it is irreplaceable for graphic designers: you select or highlight the text or a single word, make right-click on the mouse, and in a matter of seconds you get the information on the font you might use for your designs.


With over 2000 users and high rating, this Firefox extension for boosting productivity and tracking work time is especially beneficial in freelancing careers as its work is marked for speed and agility. Its feature set includes:

  • timeline view of your work hours
  • extracting reports on your activity in a click
  • creating invoices
  • choosing among various project cost rates and budgets.
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What makes it worth trying? Not having to open a separate tab to run the timer is very convenient as it gives you the opportunity to focus on your tasks instead of losing effort on monitoring the accuracy of time calculations.

Freelancer Helper

To prevent the prompt downloading of the attachment you get, apply Freelance Helper. You will be able to open the info you got but without an automatic switch of the download.

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What makes it worth trying? It is a great extension for those freelancers who want to have a filter on unwanted projects.

Mate Translate

If you need to save time on translation lookup you need to search no further. With over half a million users, this Firefox add-on has everything to satisfy your need in terms of delivering instant accurate translation to/from 103 languages.

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What makes it worth trying? Implementing this add-on will not only save your time while communicating but has a wide functionality in terms of providing the unbroken freelancer's workflow.

Web Paint

This Firefox add-on will let you make drawings over the web pages choosing from a wide range of shapes. Among lots of available options, you can apply to restore the drawing, erasing recent drawings, etc.

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What makes it worth trying? It is a great add-on for making an annotation. The tool is irreplaceable for preparing presentations, design projects, and facilitating communication in general.

Ghostery - Confidential adblocker

The name of the add-on is self-explanatory. If you want to join a million audience of users you can install it in your browser and it will ensure your privacy against tracking and advertising.

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What makes it worth trying? It is one of a kind extension as it works noiselessly in the background and eliminates all the distractions enabling your total focus on projects you are busy with.


Available in two versions (Momentum and Momentum Plus), this add-on will surely make you more productive as it provides a personal dashboard containing your to-do list, weather forecast, and motivational quotes for keeping you inspired throughout the day.

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What makes it worth trying? The customizable dashboard comes handy when you need to make notes, keep updated or simply take a minute break.

Search by Image - Reverse Image Search

Use this extension to enable the reverse image search with various search engines including Google, Bing, Yandex, Baidu, and TinEye. 238 users estimated the extension as 5 out of 5 mentioning its helpfulness and convenience for research purposes.

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What makes it worth trying? You can toggle among 21 search engines from the options page and work in 5 search modes. An absolute game-changer for verifying the information and profiling the content.

Evernote Web Clipper

This add-on belongs to the class of 'looking-good, working-fine'. It saves every form of a web page you might need for your freelancing projects. You can copy the selected text or images, create bookmarks and format the article tailoring it to your needs.

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What makes it worth trying? It takes screenshots of web pages and automatically saves them to your Evernote account. Overall, it will take you a second to save the information from the Internet and fold it in collaborative and business notebooks.

Grammarly for Firefox

This Firefox extension is your reliable assistant for establishing the efficient and prompt collaboration as it ensures that you communicate in a clear correct way.

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What makes it worth trying? It does not only check your spelling and grammar but makes a huge impact on up scaling your communicative skills.

Highly recommend anyone to use Grammarly regardless of how good your English is.

Print Edit WE

With this extension, you easily edit the web page contents before you hit on print or save button. The additional options include shading the background for selection boxes and snapping the box to the web page edge.

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What makes it worth trying? Besides editing, you can format, hide or delete the parts of the page. The distracting content including adverts and sidebars can be hidden in a click.

Dark Reader

Working irregular hours means sitting in front of the computer at nighttime. Dark Reader will adjust the background light shifting it to a darker one to save your eyes from tiredness.

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What makes it worth trying? It is possible to adjust the brightness, contrast, font, inversion mode, the blend mode of the yellow filter (sepia).


With almost 200000 users, Disconnect rates are among the best privacy tools. The extension developers focused on giving total control to users. It will surely keep your browsing data safe.

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What makes it worth trying? In addition to such featured options as an easy whitelist function, an infallible tracker detection, and accurate information on how much bandwidth the user saves, it is also completely compatible with the latest version of Firefox.

Media Converter and Muxer

It is a video audio converter and muxer presented in WebExtension for mixing video/audio files in a combo, converting video and audio files to MP# format, and 'squeezing' the original audio track out of a video file.

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What makes it worth trying? Among many listed features, it allows you to alter videos from YouTube on your computer, which is more than helpful.

Wikiwand: Wikipedia Modernized

It is the optimized Wikipedia for quick search of content and ultimate research experience.

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What makes it worth trying? You can navigate within the fixed table of contents in various languages, get link preview, access the rich image gallery in a click, personalize layout, fonts and colors.

Live editor for CSS and LESS

This extension will help you save tons of time. It embraces a great number of user cases. Implementing this add-on means that you can start writing ( with wide options of 'beautifying' it later) your CSS/LESS code and apply it at once.

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What makes it worth trying? Reliability. The code you created is secure in your browser's local storage at the site level.


Enjoyed by more than 170000 users, this add-on will be a great tool both for designers and developers. The functionality includes color picking options for creating impeccable designs.

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What makes it worth trying? You will certainly find it useful for creating color effects gradients in web designing. Can be considered the number one recommendation for all web designers and web developers.


It is a handy extension for developers as it helps put a semi-transparent image overlay over the top of the developed HTML and calculate per pixel comparison between them with precision.

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What makes it worth trying? Though it does not have many users in Firefox, it does not diminish the diverse advantages of this extension including zero restrictions on the image size alterations, easy-to-apply UI, and mouse wheel support, to name a few.

1Password X

The best way to save time is to store the relevant information in one secure (!) place, which is of special importance when it comes to passwords. In one click, this password manager will keep you safe online.

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What makes it worth trying? You can access any site or service you need directly in Firefox. Fill and save passwords, find and edit items. Take note though that running this extension requires the 1Password membership.

To conclude

The Mozilla Firefox add-ons and extensions you will find in our list of top recommendations for freelancers will be facilitating your work and boost productivity by improving speed, providing a smooth workflow, and keeping your data secure.