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Text-to-Speech Notice for Different Browsers

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Last update January 2026

Text-to-Speech Notice for Different Browsers

The plugin’s text-to-speech feature relies on the Web Speech API provided by modern browsers. The quality of the spoken voice can vary significantly depending on the browser being used.

Google Chrome and Safari offer high-quality, natural-sounding voices by default. These voices are used automatically without requiring any additional configuration, resulting in significantly better voice output across many languages.

You can choose from 40 different languages currently available. With each update, additional languages will be added to enhance user experience. 

A colorful bar chart displays the popularity of different web browsers among users. The tallest bar, colored in blue, represents Google Chrome, showing it is used by roughly two-thirds of visitors (approximately 68%). Next to it, a shorter green bar marks Safari’s usage at about 19%. Several smaller bars follow: one for Mozilla Firefox, one for Microsoft Edge, another for Opera, and one for Samsung Internet—all indicating much lower usage rates. A second set of bars beside the first mirrors these trends among sites equipped with WordPress accessibility plugins; here too Chrome has the largest presence by far, followed by Safari and then the other browsers with lower use. All percentages are clearly labeled above each bar for easy reading. The chart background offers high contrast to support readability, and information is organized from highest to lowest browser share from left to right.

Firefox: Limited Voice Quality

Mozilla Firefox uses only the system-installed voices available on the user’s device. Especially on Windows, these voices often sound robotic or unnatural. Unfortunately, this behavior is controlled by Firefox itself and cannot be modified by the plugin.

Solution in Progress

We are currently working on an alternative solution to improve voice quality in Firefox. Until then, we recommend using Chrome or Safari for the best text-to-speech experience.

Tip for Advanced Users

On Windows and macOS, additional system voices can be installed through system settings. This may improve voice quality in Firefox depending on the configuration.