How to change Font size in Firefox Picture in Picture Mode

Not too long ago, Mozilla Firefox added subtitles and captions to its Picture in Picture feature, but there is a problem. You see because the Picture in Picture mode showcases on a small screen, there are times when the subtitles or captions can be hard to see. The good news is, that there are ways to enlarge the font to make things much easier to read. Unfortunately, the folks at Mozilla did not choose to bring this feature to the forefront in Firefox, therefore, getting to it won’t be as simple as we’d hoped. But no need to worry because we’re going to explain everything you need to know to ensure you’re always on the right track.

How to change Font size in Firefox Picture in Picture Mode

To change the Font size in Firefox Picture in Picture Mode subtitles and captions, follow these steps:

Open the Mozilla Firefox web browser
Navigate to about:config
Go to the Preferences area for Font Size & make the change
Check to see if the font size has changed

1] Open the Mozilla Firefox web browser

To begin, we must first launch the Firefox web browser since what we’re going to discuss here is not tied directly to Windows itself.

Find the location of the shortcut icon for Firefox
Click on it once or double-click to launch it.

2] Navigate to about:config

Use your mouse to click within the URL bar in Firefox

Type about:config in the URL box and hit Enter.
Check the section that reads, “Warn me when I attempted to access these preferences”.
After that, please click the button that reads, “Accept the Risk and continue”.

3] Go to the preferences area for Font Size

The next step then is to find your way to the Font Size preference section of about:config.

Copy and paste media.videocontrols.picture-in-picture.display-text-tracks.size into the search box.
Hit the Enter key to go to the relevant section.
By default, the font size is set to Medium.
Click the pencil icon to change the size.
You can choose between Small, Medium, or Large.
Hit the Enter key to complete the task.

You can now close the about:config window. Return whenever you want to make changes to the font size once more.

4] Check to see if the font size has changed

Navigate to a YouTube video with a caption.
Then from there, play the video.
Switch over to Picture in Picture mode.
Look to see if the subtitles are in accordance with your needs.

If the font size is to your liking, then you’re good to go. However, if not, then you must return to the font size section in about:config to make additional changes.

Read: How to get Firefox Vertical Tabs on Windows PC

Enable Picture in Picture (PiP) Mode in Firefox

If you want to learn how to enable Picture in Picture Mode where Firefox is concerned, then keep reading.

Open the Firefox browser on your Windows 11/10 computer.
Click on the hamburger menu button in the top-right section of the browser.
From the dropdown menu, select Options to open the settings menu.
From the Options window, scroll down to the Browsing section.
Look for Enable picture in picture video controls and click the checkbox next to it.

What is Picture in Picture mode?

Picture in Picture, or PIP for short, is a special type of multi-window mode that is used for video playback in most situations. It allows the user to watch a video in a small, pinned window while browsing other content or navigating through other apps.

Why is the font so small in Firefox?

You might not have known this, but Firefox uses an automatic feature to change the size of your font. This is done to match the font size with the settings of your device. We suggest disabling this feature and manually setting your font size.