av9ash/GitBugs huggingface dataset:
Bug: The CTA modules are not recognized by the browser’s “Listen” function from the Reader view
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2021-11-04 09:38:19+00:00
Resolved: 2021-11-09 22:03:47+00:00

[Affected versions]:
- Firefox Beta 95.0b2 (Build ID: 20211102190739)

[Affected Platforms]:
- Windows 10 x64
- macOS 11.6
- Ubuntu 20.04

[Prerequisites]:
- Have the Firefox browser installed and opened.
- Have the “reader.pocket.ctaVersion” pref set to ”cta-and-recs”/”cta-only” value.

[Steps to reproduce]:
1. Navigate to any page that supports Reader View mode.
2. Click the "Reader View" button from the right part of the Address Bar.
3. Scroll down the page until the CTA module is visible.
4. Click the "Listen" button from the Reader view sidebar.
5. Click the "Play" button from the panel.
6. Observe if the CTA module is read by the narrator.

[Expected result]:
- The CTA module is recognized by the narrator.

[Actual result]:
- The CTA module is not read.

[Notes]:
- According to the [PRD](https://docs.google.com/document/d/1n1TTBprHhAgsZ1YIRmNb6CQa06bHJjyjA_nUrG3pAh0/edit) document, the Firefox should read the CTA module if it is not closed or minimized.
Bug: When a filetype is set to "always ask" and the user makes a save/open choice in the dialog, we should not also open the downloads panel
Status: VERIFIED
Priority: P3
Resolution: FIXED
Created: 2021-11-04 10:58:37+00:00
Resolved: 2022-09-14 14:49:01+00:00

As in summary. There's no need to add another prompt / interruption in this case - the motivation for showing the panel is to allow quickly opening the file, but in this case the user has already had an opportunity to set that up.
Bug: Site identity popup is not aligned with its anchor for Nightly/Firefox about pages like settings/preferences
Status: RESOLVED
Priority: P3
Resolution: FIXED
Created: 2021-11-04 11:09:23+00:00
Resolved: 2022-11-24 09:32:36+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Navigate to about:preferences
Click "Firefox" button at beginning of urlbar


Actual results:

the popup menu is not aligned properly


Expected results:

the popup menu should be aligned properly
Bug: ion.js  crashes when opened with BrowserTestUtils.withNewTab()
Status: NEW
Priority: --
Created: 2021-11-04 11:51:24+00:00
Resolved: 2021-12-14 16:47:59+00:00

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:96.0) Gecko/20100101 Firefox/96.0

Steps to reproduce:

This test [1](https://searchfox.org/mozilla-central/rev/88cd13997fb0747cdcd78638fc762ff2d75e1fc5/browser/base/content/test/siteIdentity/browser_check_identity_state.js#62) crashes if   [2](https://searchfox.org/mozilla-central/rev/88cd13997fb0747cdcd78638fc762ff2d75e1fc5/browser/base/content/test/siteIdentity/browser_check_identity_state.js#64-68) is not set. The Error is probably rooted here I guess [3](https://searchfox.org/mozilla-central/rev/88cd13997fb0747cdcd78638fc762ff2d75e1fc5/browser/components/ion/content/ion.js#116).

Actual results:

Error message:  FAIL A promise chain failed to handle a rejection: can't access property Symbol.iterator, cachedContent is undefined - stack: @chrome://browser/content/ion.js:687:26


Expected results:

Test should pass without [2] so that this lines can be removed.
Bug: Crash | Selecting all the default bookmarks and deleting them at once
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2021-11-04 12:59:30+00:00
Resolved: 2022-01-10 19:29:10+00:00

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

**Crash [report](https://crash-stats.mozilla.org/report/index/44aa4a4a-0e19-47bf-8e1b-12b820211104):** 

_1._ Create a profile
_2._ Select all the default bookmarks and delete them **at once**.


Actual results:

Crash.


Expected results:

No crash.
Bug: [Monochromatic Theme]  Title Bar checkbox on customize page is still invisible or has bad contrast, using all soft themes and also on Find toolbar checkboxes.
Status: RESOLVED
Priority: --
Resolution: WORKSFORME
Created: 2021-11-04 15:15:00+00:00
Resolved: 2022-05-04 21:19:37+00:00

**Affected versions**
* Beta 95.0b2 (64-bit)

**Affected platforms**
* Win 10 x64
* macOS 10.13
* Ubuntu 20.04 x64

**Steps to reproduce**
1. Launch Firefox.
2. Go to add-ons and themes.
3. Select Cheers->Soft theme and enable.
4. Open Customized page.
5. Check the Title Bar check box.
 
**Expected result**
* Check box should be visible.

**Actual result**
* Check box is not visible. 

**Regression range**
* I will add if needed


**Additional notes**
* Issue reproduced on all Soft themes and on Cheers-Bold on all OSs(Ubuntu 20.4, Mac 10.13 and on Win10 only for Cheers-Bold).
*Please note that this issue also affected the checkmarks from the Find toolbar - on soft themes.
*This is logged based on comment 11 and 12 from bug 1734948.
Bug: Search dropdown in about:newtab is not dark in dark mode with browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar set to false
Status: VERIFIED
Priority: P5
Resolution: FIXED
Created: 2021-11-04 15:37:27+00:00
Resolved: 2021-12-08 12:54:37+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko/20100101 Firefox/96.0
Build ID: 20211104094642

### Steps to reproduce
1. In a new profile, set `browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar` to **false**.
2. Set Nightly theme to dark, or other Colorways themes that default to dark. (OS light/dark mode is irrelevant.)
2. In about:newtab, type `a` in the search bar at the middle of the newtab page.

### Actual result
The search suggestion dropdown is not dark. Please see the attached screenshot.

### Expected result
The dropdown is dark.

### Regression
Last good Nightly: 2021-09-16
First bad Nightly: 2021-09-17
pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=4f9a1f599b43c1748edf0ce1b42a25b5f825db7e&tochange=186467330eb16b1e6ac6c7b2b3794f5b5cdc5341

autoland:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=462b8ab0d119d85c044a1332446b609786fcabc7&tochange=4d1d81ae7b7edc5668d65b6927d907feab8d0e21

This is regressed by bug 1727319.

### Credit
This is originally reported by deviltrombone on [Reddit](https://www.reddit.com/r/firefox/comments/qmddbh/firefox_94_dark_mode_has_white_background_search/).
Bug: Need to reset `gK32ExportsResolveOnce` after `gSharedSection` is updated
Status: RESOLVED
Priority: --
Resolution: FIXED
Created: 2021-11-04 16:11:21+00:00
Resolved: 2021-11-06 09:34:40+00:00

Reproduced by introducing `UtilityProcess` gtest, failing `TestDllBlocklist.NoOpEntryPoint`, because of `UtilityProcess` sandbox' call to `GetPrespawnCigExceptionModules()`
Bug: The search bar dropdown on a new tab does not respect the firefox theme
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2021-11-04 17:13:21+00:00
Resolved: 2021-11-05 15:52:24+00:00

I use the setting  `browser.newtabpage.activity-tream.improvesearch.handoffToAwesomebar` `false` because I prefer it.

Since updating to firefox 94 (it's also the same on 96, I installed a nightly to check) the dropdown of autocompletes and search engine choices does not follow the dark theme or system theme (which is dark for me).  Screenshot will be attached.
It was fine in version 93
Bug: Permanent Android services/settings/test/unit/test_remote_settings_utils_telemetry.js | test_telemetry - [test_telemetry : 143] parent must be in snapshot. Has []. - false == true when Firefox 95 merges to Release on 2021-11-29
Status: VERIFIED
Priority: --
Resolution: FIXED
Created: 2021-11-04 17:56:23+00:00
Resolved: 2023-03-23 15:07:22+00:00

* [beta-as-release simulation](https://treeherder.mozilla.org/jobs?repo=try&group_state=expanded&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=c70b3cc05ec4c2a2cc6ff6f35179e2e97264d5e3&selectedTaskRun=RRPggUBsSOmSFpoPF3UP_g.0)
* [How to run these simulations](https://wiki.mozilla.org/Sheriffing/How_To/Beta_simulations#BETA_AS_RELEASE_SIMULATION)
* [Failure log](https://treeherder.mozilla.org/logviewer?job_id=357004453&repo=try)

```
[task 2021-11-04T15:41:55.627Z] 15:41:55  WARNING -  TEST-UNEXPECTED-FAIL | services/settings/test/unit/test_remote_settings_utils_telemetry.js | test_telemetry - [test_telemetry : 143] parent must be in snapshot. Has []. - false == true
```
Bug: Intermittent [tier 2] uriloader/exthandler/tests/mochitest/browser_extension_correction.js | Found an unexpected tab at the end of test run: about:neterror?e=fileNotFound&u=file%3A///tmp/Temp-2b256650-8132-43ec-a4af-b43c27e10f16/testsavedir3480944707/some
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-11-04 18:26:56+00:00
Resolved: 2021-12-07 17:03:38+00:00

**Filed by:** imoraru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=357019837&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/YidrEiLeRWeEOHc7I2zl5g/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2021-11-04T17:37:59.963Z] 17:37:59     INFO - TEST-OK | uriloader/exthandler/tests/mochitest/browser_extension_correction.js | took 1639ms
[task 2021-11-04T17:37:59.971Z] 17:37:59     INFO - TEST-INFO | started process screentopng
[task 2021-11-04T17:38:00.329Z] 17:38:00     INFO - TEST-INFO | screentopng: exit 0
[task 2021-11-04T17:38:00.329Z] 17:38:00     INFO - TEST-UNEXPECTED-FAIL | uriloader/exthandler/tests/mochitest/browser_extension_correction.js | Found an unexpected tab at the end of test run: about:neterror?e=fileNotFound&u=file%3A///tmp/Temp-2b256650-8132-43ec-a4af-b43c27e10f16/testsavedir3480944707/somefile.pdf&c=UTF-8&d=Firefox%20can%E2%80%99t%20find%20the%20file%20at%20/tmp/Temp-2b256650-8132-43ec-a4af-b43c27e10f16/testsavedir3480944707/somefile.pdf. - 
[task 2021-11-04T17:38:00.329Z] 17:38:00     INFO - checking window state
[task 2021-11-04T17:38:00.329Z] 17:38:00     INFO - TEST-START | uriloader/exthandler/tests/mochitest/browser_first_prompt_not_blocked_without_user_interaction.js
```
Bug: Download button does not display progress of downloads if pressed
Status: VERIFIED
Priority: --
Resolution: WORKSFORME
Created: 2021-11-04 19:36:59+00:00
Resolved: 2022-05-19 03:30:09+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.7113.93 Safari/537.36

Steps to reproduce:

Clicked on the download button to see the progress of my current download.

I had done this a few minutes before with a previous download and it showed perfectly. I did so again this time for another file (the same file actually which I needed to download again) and no little window appeared. Cmd+J still shows the popup download window itself, detached from the main window, but I'm talking about the small inline popup.

The animation pie chart for percentage downloaded still worked.  


Actual results:

If i click on the button right now the button is highlighted slightly  (normal css behavior), but no popup appears as it should.
Bug: Tabs scrolled all the way to the left when entering fullscreen from pinned tab
Status: NEW
Priority: --
Created: 2021-11-04 19:50:32+00:00
Resolved: 2023-01-26 15:14:47+00:00

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Open tabs until they are scrollable, open Youtube (or any other video streaming platform), pin the Youtube tab, enter and leave fullscreen from Youtube tab.


Actual results:

Tabs get scrolled fully to the left


Expected results:

No tab scrolling when entering fullscreen
Bug: XFA PDF not opening properly
Status: RESOLVED
Priority: P1
Resolution: FIXED
Created: 2021-11-04 20:55:51+00:00
Resolved: 2022-01-05 16:14:44+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0

Steps to reproduce:

Open XFA PDF (Attached to this ticket)


Actual results:

All pages work fine except page 6


Expected results:

Page 6 would have loaded fine.
Bug: Locationbar in a new tab is cleared if typing too fast
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2021-11-04 22:46:06+00:00
Resolved: 2021-11-13 13:15:56+00:00

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0

Steps to reproduce:

I pressed "ctrl+t" and then "n" *quickly* to open a new tab and have firefox autosuggest a website to me.

To reproduce it and create the video I have attached, I used the xdootool commands below.  With a delay of one second (sleep 1)  everything is fine. When then delay is then reduced (sleep 0.01) the browser can't keep up.

I didn't measure how fast I typed, but since I upgraded to 94 this morning, it has tripped me up multiple times.

#/bin/sh
xdotool key ctrl+t ;
sleep 1;
xdotool key n;
sleep 2 ;
xdotool key ctrl+w; 
sleep 1; 
xdotool key ctrl+t ; 
sleep 0.01; 
xdotool key n;


Actual results:

The new tab opened, the 'n' and the associated suggestion flashed at me, and then the locationbar was cleared automatically, leaving me with the new tab page.


Expected results:

The locationbar should not have been cleared of my input that it had already received.
Bug: `feature.enabled` is still in use even when server already removed it
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2021-11-04 23:20:12+00:00
Resolved: 2021-11-05 20:32:55+00:00

Similar to bug 1739007 with functionality broken with the removal of `feature.enabled`, there's some other code still relying on it such as ASRouter exposure ping:

https://searchfox.org/mozilla-central/rev/a12c2c2e59c92d8f969d8f3f290ab16919449c9d/browser/components/newtab/lib/ASRouter.jsm#344-352

There may be other existing uses of the direct object property access instead of using the `isEnabled()` wrapper. But even with `isEnabled()`, that assumes correct experiment feature value configuration with setting `{enabled: true}`
Bug: After updating to Beta 95, Firefox launched with no title bar
Status: VERIFIED
Priority: --
Resolution: FIXED
Created: 2021-11-05 00:33:04+00:00
Resolved: 2021-11-19 10:53:26+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0

Steps to reproduce:

I had previously configured Firefox to show the regular system title bar.

I was running Firefox 94 on the beta channel, and was prompted to restart the browser for an update.




Actual results:

After updating, there was no title bar. Thus there was no way to move the Firefox window, or minimize/maximize/close it using the usual buttons on the title bar.

Eventually I tried "Customize Toolbar", where I found the Title Bar checkbox that had somehow been forcibly turned off during the update. Checking the box cause the title bar to reappear as desired.


Expected results:

The browser should have continued to respect the "Title Bar" setting across upgrades.
Bug: Missing space in produce name in MSIX release
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2021-11-05 02:42:00+00:00
Resolved: 2021-11-05 16:29:43+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Download MSIX release from ftp.mozilla.org and install it on Windows 10 21H1


Actual results:

The installed application name was shown as "MozillaFirefox"


Expected results:

There should be a space between "Mozilla" and "Firefox", or just it "Firefox"
Bug: browser.theme.content-theme and browser.theme.toolbar-theme are reset on browser restart or theme change
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2021-11-05 04:56:16+00:00
Resolved: 2022-01-20 20:17:04+00:00

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:95.0) Gecko/20100101 Firefox/95.0

Steps to reproduce:

Multiple months ago Firefox UI switched to dark mode with most of installed themes on my machine, including the theme I use primarily - OldWood. I don't like dark modes, but having dark mode only in UI wasn't so annoying. After updating to 95.0b3, sites started to use dark mode, as well. Then, I asked for help at https://t.me/mozillian and they told me about browser.theme.content-theme and browser.theme.toolbar-theme options in about:config.


Actual results:

Switching both of them to 2 or only browser.theme.content-theme to 1 does help, but when theme change or browser restart happens, browser.theme.content-theme resets to 2 and browser.theme.toolbar-theme resets to 0. I tried to add them to my user.js, but that doesn't help either.


Expected results:

Both of the options or at least one of them shouldn't reset on its own.
Bug: fire fox wont page advance
Status: RESOLVED
Priority: --
Resolution: WORKSFORME
Created: 2021-11-05 08:29:49+00:00
Resolved: 2021-12-17 13:33:04+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Microsoft surface running windows 10. Browsing IMDb irefox 94.01 64bit
 example of issue at :
https://www.imdb.com/name/nm5939164/mediaviewer/rm765351424?context=default&ref_=nm_phs_md_1

Attempt to move thru pictures using navigation arrows gets no resonse. Copy url to "say" edge and navigation works fine.

This happens with all imdb picture views like this.








w
At this url or any other similar location in imdb  in "imdb picturrs" im unable to activate the right arrow or left arrow to advance through the pictues.
Copying the url to "say" edge and things work fine


Actual results:

No response, am unable to advance thru the available pictures.


Expected results:

move to next picture in the sequence
Bug: Bookmarks toolbar not shown on new tab
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2021-11-05 09:06:10+00:00
Resolved: 2021-11-19 16:22:40+00:00

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

1. Select from the menu: View > Toolbars > Bookmarks Toolbar > Only show on new tab

2. Open a new tab.


Actual results:

Nothing: new tab is opened, but the bookmarks toolbar is not shown.


Expected results:

The bookmarks toolbar should be shown.
Bug: Messaging system should use feature.variables.enabled, not feature.enabled
Status: RESOLVED
Priority: P1
Resolution: FIXED
Created: 2021-11-05 17:15:12+00:00
Resolved: 2021-11-18 15:19:51+00:00

After deprecating .enabled in experimenter, we discovered messaging system is still using the old property. We should update it to use `feature.variables.enabled`
Bug: The New Update messes up Custom Colors specifically the "Use System Colors" Toggle When applying custom colors.
Status: VERIFIED
Priority: --
Resolution: FIXED
Created: 2021-11-05 19:55:07+00:00
Resolved: 2023-06-02 15:22:29+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

Downloaded the new update from Nov. 5 , 2021


Actual results:

The new update forced all of my websites to white. The "Use System Colors" Toggle is Broken in Settings, when applying custom colors and selecting "Always"


Expected results:

The update should have updated seuccessfully and not forced me to find out why all my webpages were magically displaying in blinding white light (My windows color is set to Dark Mode). There is still clear evidence of this bug, as the Firefox settings is displaying in white, while my webpages are displaying my custom colors now. 
The previous version had the settings page display in the same colors as my custom colors "Selected in Firefox 'Grey Background, Orange text'", but now this is an impossibility no matter which options are toggled, and settings are turned on or off.
Bug: On first startup after installation of Firefox v 94.0.1, session was cleared
Status: RESOLVED
Priority: --
Resolution: INCOMPLETE
Created: 2021-11-05 20:22:21+00:00
Resolved: 2022-01-27 08:18:58+00:00

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

I installed Firefox v 94.0.1 when I got a new version notification.
On the first startup after the installation, Firefox started a session with a single tab showing a blank page, and a popup over that offering that "new colorways are available" and asking if I wanted to try them.  I said no.
Then another popup appeared (or contents of same popup were changed) to say thank you for using Firefox. This had a button "start browsing".
That was worrying, but I'd backed up my profile, so I clicked it.
The popup was removed, exposing the blank page.
I opened the history menu -- "restore previous session" was grayed out.
I looked at the profile -- the session had been cleared.
I killed Firefox using Task Manager to prevent it from overwriting the previous session.
I copied backup.jsonlz4 -> previous.jsonlz4 and started Firefox again.
This time, no popups, and I got the usual session restore page, which did find the full session.


Actual results:

The session got cleared on first startup after installation of version 94.0.1.

Note in the past, new version announcements have been delivered *on a web page*, not *on a popup*.  I am reporting this in case the new use of a popup is responsible for clearing the session.


Expected results:

The previous session should have been retained.
Bug: One mouse wheel notch jumps 5/6 lines up or down inside bookmarks folders placed in the personal bar.
Status: NEW
Priority: P3
Created: 2021-11-05 21:34:29+00:00
Resolved: 2021-11-09 16:36:14+00:00

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

I created a set of bookmark folders in my personal bar to manage my bookmarks collection from there. To reproduce the bug one given folder must contain enough bookmarks so mouse scrolling is mandatory to navigate within. I could reproduce the bug on a separate installation of Firefox 94.0.1 (64bits). It happens every time.


Actual results:

When I scroll through one of my personal bar folder, one wheel notch takes me 5 to 6 lines down or up at a time, which makes it very uneasy to find the right bookmark in a long list (however, scrolling behavior has not changed for drag and drop from the address bar to the folder).


Expected results:

The bug as I see it is that scrolling behavior in folders' content on the personal bar should be the same as in the hamburger menu > bookmarks/history, same type of smooth scroll and the same amount of lines scrolled.
Bug: Unable to customize or override screenshot shortcut
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2021-11-05 23:00:42+00:00
Resolved: 2021-12-15 10:01:12+00:00

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:94.0) Gecko/20100101 Firefox/94.0

Steps to reproduce:

According to the support docs [1], I should be able to customize the screenshot shortcut from the "Manage Extension Shortcuts" settings page.

[1]: https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly#w_tools


Actual results:

I can find no such setting on that page.

Trying to assign the same shortcut to 3rd party add-on shows an error with the message, "Cannot override a Firefox shortcut".


Expected results:

There should be a section for "Take a screenshot" with the ability to change or delete the shortcut.

This was available in Firefox 93.
Bug: How to hide default screen size in Firefox?
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2021-11-05 23:34:54+00:00
Resolved: 2021-11-06 14:24:27+00:00

How can i hide my display/screen resolution from websites?
I use Firefox in windowed mode not with my default screen size but websites know my default resolution.
This can be used to identify my pc. I dont want that for privacy reasons like tracking and adverstising.
How can i prevent this? 
I found many threads/posts about this in various forums/websites.
They are talking about Tor Browser and that websites can identify you if using full-screen mode.
But as i said, im using Firefox not Tor and while im using windowed-mode websites still know my default resoltion.
I tested this on https://whoer.net/

Another question, how can i restore the default window size in Firefox?