When you go there do you get the button for narrator that comes up?

https://support.mozilla.org/en-US/questions/1139829

reviewed.

Hi please make sure you have accessibility services turned on.

Please : go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions remove the check in the box the setting to Prevent Accessibility Services from accessing your browser.

When not in use disable it as can cause high heat and can be a security issue.

• https://support.mozilla.org/en-US/kb/accessibility-features-firefox-make-firefox-and-we
• https://support.mozilla.org/en-US/kb/accessibility-services

Note that reader view open a special about page (about:reader?url=). Extensions do not work on about pages.

• Open in Reader View 0.2.1 (jid0-fgmjSq5kJtop0oO9u5hJj@jetpack)
• Read Aloud: A Text to Speech Voice Reader 1.3.5