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Firefox Displaying Broken Characters

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This recently happened on Firefox for my laptop and the characters are broken. I've tried re-installing and removing the files Application Support/Firefox, but the issue still persists. The language is set to English CA. Can anyone help with this please?

Device: Macbook Pro - M3 Chip - Sonoma 14.5

This recently happened on Firefox for my laptop and the characters are broken. I've tried re-installing and removing the files Application Support/Firefox, but the issue still persists. The language is set to English CA. Can anyone help with this please? Device: Macbook Pro - M3 Chip - Sonoma 14.5
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Firefox version: 130.0

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You can check for issues with (corrupted) fonts.

You can right-click and select "Inspect" to open the built-in Inspector with this element selected.

You can check in the Rules tab in the right panel in the Inspector what font-family is used for selected text. You can check in the Fonts tab in the right panel in the Inspector what font is actually used because Firefox might be using a different font than specified by the website, if necessary expand "All fonts...". If the Fonts tab is hidden, click the Down arrow at the right end.

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