When playing a video on the Amazon website in Firefox, the closed captions option was available but not working. Even after turning the option "On", no captions would display. The captions worked ok in other browsers.

I tried running Firefox in safe mode, with all add-ons disabled. That way, the captions also worked. I narrowed it down to a problem with the NoScript add-on. Enabling scripts globally didn't make a difference (I already had Amazon.com whitelisted). To fix the problem, I had to change the XSS settings - in the NoScript settings window, under Advanced - XSS, unselect the checkbox for "Sanitize cross-site suspicious requests".

Rather than turning off XSS protection for all sites, you can instead add a URL pattern to exclude from the protection. I tried this: ^https?://([a-z,-]*)\.amazon\.com/.*
Oddly, using that, the captions still don't display the first time I open the video. But if I close and reopen it, then they do display.
YouTube seems to open most videos in playlist mode nowadays, which causes the next video in the list to automatically start playing after the current one finishes. On each video, you can unselect the autoplay icon in order to turn it off. But that only disables it for the current video.

To disable playlists for all videos, you can install the Firefox "Redirector" add-on, which lets you enter rules for redirecting from one URL to another URL.

Enter a new redirect with these values:
Include Pattern:https://www.youtube.com/watch?v=*&list=*
Exclude pattern:
Redirect to: https://www.youtube.com/watch?v=$1
Pattern Type: wildcard
Enabled: checked
Firefox has a setting: "Options - Content - Colors... - Allow pages to choose their own colors, instead of my selections above". This item is selected by default.

If you unselect this item, this will cause problems with Yahoo's webmail interface:

- The Gear icon will no longer display on the top right corner of the page.
- The Emoticons pop-up window will be blank
- The Paperclip icon or the "Attach from my computer" menu item may not work - the File Upload window never displays. (This happened on one computer but not another, so I'm not completely sure of its cause.)

Internet Explorer has similar display problems, when in Internet Options under "General - Accessibility", you select "Ignore colors specified on webpages". If you happen to select "Ignore font styles specified on webpages", that even causes many of the Yahoo Mail action icons to disappear.
Hide Tab Bar With One Tab - a Firefox add-on that restores the ability to hide the tab bar when only a single page is open in the browser window.

This used to be controllable from within the Firefox options, but the option was removed in one of the recent Firefox updates.

Version 25 of Firefox, named "Australis", is due to bring more UI changes.

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djinncoyote

February 2017

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