av9ash/GitBugs huggingface dataset:
Bug: about:preferences - Privacy permissions - whole block new request inner row is clickable instead of just text+checkbox
Status: RESOLVED
Priority: P5
Resolution: WONTFIX
Created: 2020-12-24 06:54:57+00:00
Resolved: 2021-01-05 17:13:40+00:00

**Affected versions**
* 65.0b4, 86.0a1 (2020-12-20), 84.0.1, 78.6esr;

**Affected platforms**
* macOS 10.15, Windows 10, Ubuntu 16;

**Steps to reproduce**
1. Launch Firefox, access about:preferences#privacy
2. Scroll down to the Permissions section;
3. Click on the Settings button for [Location, Camera, Microphone, Notifications, Autoplay **or** Virtual Reality];
4. On the block new requests row (one with the checkbox), hover the mouse cursor away from text (to the right);
5. Keep clicking while moving the mouse to the right;

**Expected result**
* checkbox should be toggled only while mouse is over text and checkbox;

**Actual result**
* checkbox toggle is registered over the whole inner row;

**Regression range**
* on initial implementation this option was not added, later on around 2018-01-09 / 2018-01-16 saw that only the checkbox was clickable; 
* result is only for when the text was made clickable:
* First bad: [2018-01-10](https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e4de69553e3faf8136eb9bb7f2f741e1b7e6f866&tochange=4db166f0442dddc5b9011c722d7499501fedf283)
* Last good: [2018-01-09](https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e4de69553e3faf8136eb9bb7f2f741e1b7e6f866&tochange=b2cb61e83ac50115a28f04aaa8a32d4db90aad23);
* Pushlog: [URL](https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e4de69553e3faf8136eb9bb7f2f741e1b7e6f866&tochange=4db166f0442dddc5b9011c722d7499501fedf283) ;

**Additional notes**
* attached recording to best illustrate the issue;
* S4 as suggested severity since the impact is insignificant.
Bug: Most of the “Customize menu” elements are not visibly focused when using keyboard navigation while the Firefox Light theme is enabled
Status: VERIFIED
Priority: P1
Resolution: FIXED
Created: 2020-12-24 10:10:13+00:00
Resolved: 2021-01-19 10:07:06+00:00

**[Notes]:**
- The issue is reproducible if the OS Theme is set to “Light” for the following Firefox themes: “Default”, “Light”, and “Alpenglow”.
- The issue is also reproducible if the OS Theme is set to “Dark” for the following Firefox theme: “Light”.
- The issue is not reproducible for Firefox “Dark” theme.
- The issue is not reproducible if the OS Theme is set to “Dark” for the following Firefox themes: “Default”, “Dark”, and “Alpenglow”.

**[Affected Versions]:**
- Firefox Beta 85.0b4 (Build ID: 20201220193140)
- Firefox Nightly 86.0a1 (Build ID: 20201223212750)

**[Affected Platforms]:**
- Windows 10 x64
- macOS 10.15.6
- Ubuntu Linux 20.04 x64

**[Prerequisites]:**
- Have the `browser.newtabpage.activity-stream.newNewtabExperience.enabled` set to `true`.
- Have the Firefox browser theme set to “Light”.

**[Steps to reproduce]:**

1. Start the Firefox profile from prerequisites.
2. Open a “New Tab” page.
3. Click the “Personalize” button located in the top right corner of the page.
4. Focus the “Customize menu”, focus each element using keyboard navigation, and observe the elements.

**[Expected results]:**
- All the elements are visibly focused using keyboard navigation.
    
**[Actual results]:**
- Only the “Manage more settings” button is visibly focused using keyboard navigation.

**[Additional Notes]:**
- Attached a screen recording of the issue.
Bug: Top sites are not replaced with new pinned sites
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2020-12-24 18:13:00+00:00
Resolved: 2021-01-02 18:30:12+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

On a new website, I select pin tab to add new tab top site.


Actual results:

Only the auto generated list of top sites is displayed ( I have 4 rows by 8 top sites.)


Expected results:

It should have removed one of the non pinned sites (auto generated from history?) and displayed the new pinned top site
Bug: When downloading a file that is internally a zip, but has a different extension (.rwp, .story, .t5script), the extension is overwritten to .zip
Status: VERIFIED
Priority: P1
Resolution: FIXED
Created: 2020-12-24 21:00:52+00:00
Resolved: 2022-01-10 13:30:59+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Downloading a .rwp (Train Simulator 2021 zipped folder) results in renaming the extension to .zip. An RWP is a ZIP folder with a specific header to tell an unpacker where to install the files.


Actual results:

When downloading .rwp the downloaded file is downloaded as a .zip, which makes opening those files without renaming the file extension to the original impossible.

When the download options window appears - where the user can chose to open the file with a program or just download it - it's said to be a .zip.


Expected results:

The file should be downloaded as the original, which is "filename.rwp".
Bug: "Most browsers no longer trust certificates issued by GeoTrust, RapidSSL, Symantec, Thawte, and VeriSign" message has non-replaced variable {$hostname}
Status: RESOLVED
Priority: P2
Resolution: FIXED
Created: 2020-12-24 23:22:39+00:00
Resolved: 2022-07-28 00:44:09+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

I went to https://moj.gov.lr/ (specifically https://moj.gov.lr/data/uploads/images/flag-of-the-three-counties-of-hub-one-region-bong-lofa-nimba-counties-along-with-the-united-nations-and-liberia-flags-been-hosted-at-hub-1.jpg) and got a security warning.  This site has a certificate "verified by" GeoTrust Inc., and the certificate expired on Friday, February 10, 2017.


Actual results:

The info in the security warning read:

> Firefox detected a potential security threat and did not continue to moj.gov.lr. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details.
>
> Websites prove their identity via certificates, which are issued by certificate authorities. Most browsers no longer trust certificates issued by GeoTrust, RapidSSL, Symantec, Thawte, and VeriSign. {$hostname} uses a certificate from one of these authorities and so the website’s identity cannot be proven.


Expected results:

`{$hostname}` in the second paragraph should have been replaced with `moj.gov.lr`.
Bug: Download file auto change to .json after upgrade to Firefox 84 (if sent with application/json mimetype)
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-25 06:59:15+00:00
Resolved: 2021-01-07 13:22:02+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Steps to reproduce:

I try to run our download file method to download a .config file.
This file's suffix name is ".config".
This file content type is application/json.


Actual results:

Firefox auto change download file's suffix name to .json.


Expected results:

It should like Firefox 83, keep download file's suffix name as .config
Bug: Site preferences and specifically notification permissions are lost with every browsing session
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2020-12-25 10:01:17+00:00
Resolved: 2021-01-02 09:52:29+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

(1) Start firefox. 
(2) go to gmail or Google workspaces (g-suite) When you are already authenticated. 
(3)  Alternatively go to web.whatsapp.com and set a non 100% zoom factor.
Grant both sites push notification permissions. 

(4) exit firefox 
(5) Go back to both sites.



Actual results:

(1) You need to grant web.whatsapp.com notification permissions again.
(2) You need to reset the previous zoom factor on web.whatsapp.com
(3) You need to grant mail.google.com notification permissions again.



Expected results:

Site settings and notification permissions should have been preserved across browsing sessions and there should have been no need to grant them again.
Bug: Firefox keeps resetting my browser.launcherProcess.enabled preference after updating
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-25 20:32:46+00:00
Resolved: 2022-01-21 20:50:11+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

I edited Firefox config ("about:config"), more than one time, then searched for "browser.launcherProcess.enabled" and set it to FALSE, because I prefer less security but the ability to drag-n-drop images on desktop. Then I updated Firefox.


Actual results:

Preference "browser.launcherProcess.enabled" is reset to TRUE every time I update Firefox to a new version.


Expected results:

My explicit preference should be maintained.
Bug: 'Undo close tab' behaves erratically
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-26 07:31:09+00:00
Resolved: 2020-12-30 10:29:44+00:00

User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Steps to reproduce:

i've closed a some tabs and i wanted to reopen the last closed tab. 




Actual results:

'Undo close tab' re-opened instead some other tab closed a while ago, with some other tabs closed in between that one and the last one. The feeling was that it behaved like a queue instead of a stack.


Expected results:

I would have expected that the last closed tab is the first one re-opened.

Repeating the experiment two times, first time it behaved 'almost correctly': it reopened some random(?) tab (from the list of closed tabs),
 then the last three closed tabs with a stack behaviour.

At second reproduction attempt, it reopened the last three closed tab with a queue behaviour.

In both cases three tabs were closed and the right-click was executed on the rightmost tab.

This is the most recent Firefox ESR, v78.6.0esr (32-bit Windows binary).
Bug: [Flatpak] Firefox flatpak does not trust self-signed certificates that the OS does
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2020-12-26 11:48:08+00:00
Resolved: 2021-06-02 17:08:02+00:00

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

I am trying to open a webpage that is signed with a self-signed certificate. In my case the page is my openwrt router's web admin UI.


Actual results:

Firefox shows me a warning regarding
MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT


Expected results:

The webpage should be loading without a security warning. I am running Fedora Silverblue and followed the proper documentation to make sure the OS trusts the certificate
https://docs.fedoraproject.org/en-US/quick-docs/using-shared-system-certificates/

I have also verified that the certificate is trusted and cleared browsing data and cache, as well as restarting firefox.

There is a relevant flatpak github issue but it is claimed that this is a firefox issue:
https://github.com/flatpak/flatpak/issues/2721#issuecomment-546994464
Bug: File -> Open File... not working at all
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2020-12-26 14:37:09+00:00
Resolved: 2020-12-27 11:03:15+00:00

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

File -> Open File.. 
OR 
In any website, trying to open a file from the computer.

I'm on Ubuntu Budgie.

ps: Even for this bug report i can't add screenshots or anything because the button "Browse..." does nothing.


Actual results:

Nothing, like really nothing, even in the console.


Expected results:

Obviously, nemo (ubuntu) should appear to select a file.
Bug: Repeated password prompts on session restore
Status: UNCONFIRMED
Priority: --
Created: 2020-12-26 17:44:03+00:00
Resolved: 2023-06-10 16:49:26+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Automatically restore last session on opening Firefox


Actual results:

Multiple password prompts as various pages complete loading. Stealing focus and input from browser windows, address bar, search panel multiple times. 


Expected results:

After first password prompt is cancelled/refused further popups should be blocked for a reasonable length of time and there should NEVER be multiple prompts on top of each other.

This is particularly infuriating if the site generating most of the prompts is one that I have already signed into and appears to be triggering the password manager  pointlessly.
Bug: Had to refresh to load sites like Netflix
Status: RESOLVED
Priority: --
Resolution: INCOMPLETE
Created: 2020-12-27 01:05:08+00:00
Resolved: 2021-01-18 13:09:19+00:00

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Tried to go to sites like netflix.com and storytelleroverland.com


Actual results:

The sites would load, but basic functionality, like playing movies or clicking links, wouldn't work. Worked fine in Chrome. I followed all the instructions/tutorials on Firefox's support site (like clearing cache, disabling extensions, etc.), but the only thing that worked was refresh.


Expected results:

Movies should have played on Netflix, and links should have worked on Storyteller's site.
Bug: Downloads popup window stops working after some uptime
Status: RESOLVED
Priority: --
Resolution: INCOMPLETE
Created: 2020-12-27 05:53:12+00:00
Resolved: 2021-03-30 11:12:48+00:00

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Run Firefox for some time (the bug doesn't happen right away, takes a couple of hours of uptime usually).
Click on the Downloads button on the add-ons panel (Display progress of ongoing downloads).


Actual results:

Downloads popup doesn't show up. Button just gets a darker grey background as if it was clicked and I can "unclick" it back to a normal background color, but the popup window won't show up, no matter how many times I try.
Downloads still work and can be monitored through the library, it's just the popup. Mini progress bar on the download icon also works.
Restarting Firefox fixes it, but after a couple more hours of uptime it breaks again.
Also it started happening only recently. Maybe after the last update (I'm have auto update on, so I'm running latest current version 84.0.1 64bit).


Expected results:

Download popup window should've popped up.
Bug: Regression: Search with google.com doesn't work
Status: RESOLVED
Priority: --
Resolution: WORKSFORME
Created: 2020-12-27 09:16:39+00:00
Resolved: 2020-12-28 19:36:55+00:00

86.0a1 (2020-12-26) (64-Bit)
macOS 11.1
Mac Arm

1.) Start Nightly with a clean Profile
2.) Be sure "Google" is your Search Engine
3.) Type something into the Address Bar
4.) Select one of the results, that you end up on the Google-Search Page
5.) Quit Firefox
6.) Restart Firefox
7.) Type something into the Address Bar

Actual: Search Engine results don't appear.

Expected: Search Engine results should appear.

Additional information: Visiting directly google.com also doesn't work, but visiting google.de works.
Bug: When "the quick brown fox jumps over the lazy dog" is typed into the Firefox search bar, Firefox slows down and eventually crashes.
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-27 09:17:08+00:00
Resolved: 2021-01-04 15:02:32+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Open a new tab with ctrl-t, type "the quick brown fox jumps over the lazy dog" in the URL bar.


Actual results:

Firefox slows down as it is typed, and crashes if it is not deleted. If there is a typo in the phrase, it will speed back up and normalize.


Expected results:

It should have kept on typing and not crash.
Bug: nvidia site
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-27 11:05:05+00:00
Resolved: 2021-01-11 08:20:42+00:00

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

tried to choose my graphicscard https://www.nvidia.de/Download/index.aspx?lang=de


Actual results:

Everytime I tried to choose one menuepoint in the dropdown menue it jumped back to the first result (the dropdowns were flickering, looked like they were reloading)


Expected results:

Choose one menuepoint and it should be locked so i can access the right one in the next box
Bug: Error writing selection data: Error writing to file descriptor: Broken pipe
Status: RESOLVED
Priority: --
Resolution: WORKSFORME
Created: 2020-12-27 17:41:00+00:00
Resolved: 2020-12-28 00:48:53+00:00

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

put GDK_BACKEND=wayland


Actual results:

can't paste between tabs. However, if if I copy and paste into some application and then copy and paste from an application to a tab it works.

Firefox prints this error when I paste from a copy in another tab.
(firefox:43862): Gdk-WARNING **: 17:27:36.342: Error writing selection data: Error writing to file descriptor: Broken pipe


Expected results:

Copy and paste between tabs should work when GDK_BACKEND=wayland
Bug: in website history, either nothing happens on middle mouse button release, or something like "place:sort=4&maxResults=15" appears
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2020-12-27 21:48:05+00:00
Resolved: 2021-05-07 11:28:08+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

1. Create new profile
2. enable "display menu bar"
3. open a few pages like youtube, google, bugzilla, and an empty tab.
close all pages
4. click on "History" in menu bar
5. hover mouse over "recently closed tabs"
6. now either:
A. hold mouse-wheel-button on an entry, then move up or down to another entry and release mousebutton.
or
B. hold mouse-wheel-button on "recently closed tabs", and while holding, move mouse cursor onto an entry in the list and release.


Actual results:

A. nothing.
B. a new tab opens with something like "place:sort=4&maxResults=15" in the URL-bar.


Expected results:

A. should open the website (that the user releases the mouse-wheel on) in a new browser-tab.
B. same as above, as A.
Bug: regression: can't save multiple media files
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2020-12-27 21:53:36+00:00
Resolved: 2020-12-31 09:29:33+00:00

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:80.0) Gecko/20100101 Firefox/80.0

Steps to reproduce:

Since MacOS FF 84.0 and in 84.0.1/85.0b4.

1. Tools -> Page Info -> Media.
2. Select two or more images
3. Save As
4. Open



Actual results:

Files are either 'stuck' downloading in download manager or nothing happens.


Expected results:

Files are downloaded and saved to disk.  Works in FF 83.
Bug: location is overwritten on page load
Status: RESOLVED
Priority: P3
Resolution: DUPLICATE
Created: 2020-12-28 08:19:52+00:00
Resolved: 2021-09-11 17:01:43+00:00

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

1. Click slow loading page (initial load, not page elements)
2. Press Ctrl+L
3. Start typing other URL


Actual results:

The loaded page's URL gets appended to what I've written so far.


Expected results:

Only what I've typed so far should be present in the location bar. Ideally even if that is nothing (trigger should probably be the focus).
Bug: Customization Toolbar is missing automatically
Status: RESOLVED
Priority: P2
Resolution: INCOMPLETE
Created: 2020-12-28 13:48:20+00:00
Resolved: 2021-10-25 18:37:24+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

A mess! Every day the customized toolbar disappears. And I need to customize again ....
This has been going on for some versions (current 84.0.1)
And even if you copy the xulstore.json folder and the entire extensions folder to the profile folder, it doesn't work.
Every time I quit Firefox and open it again, I lost all the customization of the toolbar ...
I've seen all the posts on support, and nothing solves me ... What can I do?
One of the reasons for not abandoning Firefox is its ability to customize with extensions, etc. But everything is lost .... every day !!
w10 x 64, Home

Today.
When turning on the laptop Firefox presents the same error: loss of the customization toolbar ...
I restore two files: prefs.js and xulstore.json
I open Firefox in safe mode. Close again.
I open it again and now the entire customization of toolbar appears. And all extensions preferences (in particular "Save Page WE")
Because? Mystery .... secrets of Firefox.


Actual results:

Missing toolbar customization


Expected results:

should retain the previous day's customization ...
Bug: Is there Fireforx's Built in Keyboard because there is problem in my laptops keyboard.
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2020-12-28 15:08:49+00:00
Resolved: 2021-04-13 21:03:29+00:00

+++ This bug was initially created as a clone of Bug #1684363 +++

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Firefox for Android

Steps to reproduce:

I try to run a HTML file.


Actual results:

THere was so slow Reloading 


Expected results:

The file should without any lazy reloading
Bug: Intermittent browser/components/sessionstore/test/browser_scrollPositions.js | scroll is fine - Got "{\"scroll\":\"322,428\"}", expected "{\"scroll\":\"161,214\"}"
Status: RESOLVED
Priority: P5
Resolution: DUPLICATE
Created: 2020-12-28 18:13:57+00:00
Resolved: 2021-01-04 12:02:02+00:00

**Filed by:** rmaries [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=325507032&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/cXj2YaDJTrW8agsKdU1nNQ/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2020-12-28T17:21:07.829Z] 17:21:07     INFO - TEST-START | browser/components/sessionstore/test/browser_scrollPositions.js
[task 2020-12-28T17:21:09.207Z] 17:21:09     INFO - TEST-INFO | started process screentopng
[task 2020-12-28T17:21:09.647Z] 17:21:09     INFO - TEST-INFO | screentopng: exit 0
[task 2020-12-28T17:21:09.647Z] 17:21:09     INFO - Buffered messages logged at 17:21:07
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - Entering test bound test_scroll
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - Buffered messages finished
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - TEST-UNEXPECTED-FAIL | browser/components/sessionstore/test/browser_scrollPositions.js | scroll is fine - Got "{\"scroll\":\"322,428\"}", expected "{\"scroll\":\"161,214\"}"
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - Stack trace:
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - chrome://mochikit/content/browser-test.js:test_is:1332
[task 2020-12-28T17:21:09.648Z] 17:21:09     INFO - chrome://mochitests/content/browser/browser/components/sessionstore/test/head.js:checkScroll:623
[task 2020-12-28T17:21:09.990Z] 17:21:09     INFO - Not taking screenshot here: see the one that was previously logged```
Bug: close caption Duplication on Twitch Stream
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2020-12-28 19:24:21+00:00
Resolved: 2021-01-04 14:12:48+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0

Steps to reproduce:

Watch Twitch Stream that has 'Stream Closed Captioner' plug-in
https://www.twitch.tv/esamarathon


Actual results:

Close Caption output is duplicated either turn off the caption from plug-in or not.


Expected results:

even in the stream itself contain close caption from inside, firefox should check the additional close caption setting and GUI state from page first.

also FF need to supply GUI for turn on/off the CC even in the page or frame doesn't allow the right click context menu.