What A+ FontSize Changer does

A+ FontSize Changer, published by jeffsbaker, is listed for Chrome, Microsoft Edge. The developer describes its purpose as “Extension that lets the user change the font text size, font type, font color and background color on a page.” This guide brings together the documented features, installation entry points and compatibility details so you can decide whether it fits your task.

Documented features

The official listing documents the capabilities below. Compare the functions you need with the available platform and paid-feature information before installing. These are the developer’s descriptions, not independent performance or security test results.

“Some Youtube captions were sometimes displaying at default text size instead of the size set by the extension.”
“Added "Blacklist" for locked profiles so that users can add websites that will not be changed by the profile that is checked.”
“Checked (or locked) profiles no longer save the values to each website so that you can uncheck the profile and those websites will default to normal.”
“2/16/2021 - Version 1.4.1 - Fixed a bug where the extension would not work when first installed on websites that were already open in the browser.”
“Even on pages with dynamic (ajax) content!”
“Even on pages with iFrames!”

Installing and opening A+ FontSize Changer

Open the Chrome Web Store link, confirm A+ FontSize Changer and the publisher jeffsbaker, then select Add to Chrome. Read the requested permissions before confirming. After installation, Chrome’s Extensions menu provides access to the extension; pinning its toolbar icon is optional. To disable or remove it later, use Chrome’s Manage Extensions page.

The manifest declares a toolbar action. Use its toolbar entry to open the extension’s action. Declared keyboard shortcuts: __MSG_increase__: {"default":"Alt+Up"}; __MSG_decrease__: {"default":"Alt+Down"}.

Using the documented workflow

Start with the operation that matches your task. The following actions are documented in the official listing; they are separate usage options, not a sequence that every user must complete. For controls not named here, consult https://www.seabreezecomputers.com/fontsize/#faq rather than assuming a particular button or menu exists.

“Click on a blank space on the website page before using the ALT+ or ALT- key.”
“Extensions are not allowed to work at Chrome Web Store, Edge Add-ons store or a chrome:// or edge:// page or the new tab page.”
“If the website has disabled keyboard keys then click on the extension icon in the toolbar and use the buttons there.”
“Create profiles to save text settings and color schemes.”

Platforms, version and interface languages

Verified store editions: Chrome, Microsoft Edge. The captured version is 1.5.4, with an update date of 2026-01-14. Version numbers and release timing can differ between stores. Only the browser-store buttons shown here were verified. A shared browser engine does not establish a separate official store edition.

The official store lists 10 interface languages. The supported-language tags on this page come from that product metadata; they are separate from the eight languages available for this guide. Check the current store if a particular language is essential to your workflow.

Price and paid features

The developer describes a free tier, trial or free version alongside paid features. Check the official website for the current feature limits and price in your region. Installing the browser package and subscribing to a connected service are separate actions; a browser-store button alone does not establish which paid features are included.

Permissions, privacy and practical limits

The published extension manifest lists these API permissions: scripting, identity, identity.email, tabs, storage, unlimitedStorage, activeTab. These are declared capabilities, not proof of what data the developer actually collects. Review Chrome’s installation prompt and the developer’s privacy policy (http://seabreezecomputers.com/privacy.htm) before granting access.

Chrome’s extension details let you inspect site access and disable the extension. If an expected control does not appear, check that the extension is enabled and that the current site is one supported in its description. Do not extend access to every site merely to troubleshoot a single website.

Questions about A+ FontSize Changer

Where is the official download? Use the Chrome Web Store button for the exact listing referenced in this guide: https://chromewebstore.google.com/detail/ckihgechpahhpompcinglebkgcdgpkil?hl=en. For other verified platforms, use their separate store buttons. This page does not distribute installation packages or modified copies.

Where should I look if a feature has changed? Compare the current store version with 1.5.4, then check https://www.seabreezecomputers.com/fontsize/#faq. The store screenshots show the supplied product imagery, but later releases and device layouts may differ. Use the official support channel for account, billing and product-specific issues.

Screenshots