What does Font Sizer do?

Font Sizer focuses on adjusting paragraph text size on websites for improved readability. It is catalogued under Browser DevTools & extensions on PulseGate.

Who should use Font Sizer?

Font Sizer is an open-source project built for firefox users who need customizable website text sizing.

Yes — Font Sizer is open source under the Open Source license and free to use.

What platforms does Font Sizer run on?

Font Sizer runs on the web, the command line, and embeddable surfaces.

Is Font Sizer still active?

Unverified. Font Sizer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Font Sizer?

Similar projects tracked by PulseGate include FontSizer, Font Size Adjuster, and Font Adjuster.

Who makes Font Sizer?

Font Sizer is developed by Treborium.

When did Font Sizer launch?

Font Sizer first shipped in 2019.

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Font Sizer

Name: Font Sizer
Author: Treborium

github.comBrowser DevTools & extensions

Font Sizer is an open-source Firefox extension that lets users change the font size of paragraphs on websites. It is intended for users who need more control over web text readability and accessibility.

Open SourceWebCLIEmbeddable

Visit github.com

Overview

3 features

In the Browser DevTools & extensions space, Font Sizer takes a focused approach. It focuses on adjusting paragraph text size on websites for improved readability. Font Sizer is an open-source project aimed at firefox users who need customizable website text sizing. Font Sizer is open source under the Open Source license. It ships for the web, the command line, and embeddable surfaces.

It is developed by Treborium, and it first shipped in 2019. Key capabilities include paragraph resizing, website text control, and firefox integration.

Summary written by a language model from the project’s public pages.

Paragraph resizing
Website text control
Firefox integration

Built with & integrations

Runs on

BrowserCLIEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed13 Sep · 15:12 UTC
Font Sizer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Font Sizer

What does Font Sizer do?: Font Sizer focuses on adjusting paragraph text size on websites for improved readability. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Font Sizer?: Font Sizer is an open-source project built for firefox users who need customizable website text sizing.
Is Font Sizer free?: Yes — Font Sizer is open source under the Open Source license and free to use.
What platforms does Font Sizer run on?: Font Sizer runs on the web, the command line, and embeddable surfaces.
Is Font Sizer still active?: Unverified. Font Sizer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Font Sizer?: Similar projects tracked by PulseGate include FontSizer, Font Size Adjuster, and Font Adjuster.FontSizer Font Size Adjuster Font Adjuster
Who makes Font Sizer?: Font Sizer is developed by Treborium.
When did Font Sizer launch?: Font Sizer first shipped in 2019.

At a glance

Pricing: Open Source
Platforms: Web · CLI
Languages: English
License: Open Source
First seen: 13 Sep 2026
Built for: Firefox users who need customizable website text sizing
Model: Open source
Solves: Adjusting paragraph text size on websites for improved readability.

Registered as

Firefox Add-ons: font-sizer

Developer

Treborium

Index record

Indexed: 13 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 13 Sep 2026

Identity audit (13)

Slug: font-sizer-github-com
Lifecycle state recorded: 13 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 13 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 13 Sep 2026
Canonical URL: https://github.com/Treborium/Font-Sizer-Firefox

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