Hello....

Do you see the captions button on the player?

Did you check the Option button in the Captions link?

Is Firefox using the Flash player or an HTML5 player?

Hello.... Do you see the captions button on the player? Did you check the Option button in the Captions link? Is Firefox using the Flash player or an HTML5 player?

You did not understand the problem. Please read it carefully again. firefox uses html5 player. It doesn't work the same in flash player.

Doesn't YouTube studio have support for that online application?

IMO, Google very purposely ignores comparability with Firefox, or just doesn't care how it works in anything except for "their" web browser, Chrome. Edge may work, too, only due to MS knuckling under to creating Edge from the Webkit / Blink browser core from the Chromium project which is what Google uses for Google Chrome.

And beyond YouTube studio support, you might find help and knowledge over at reddit.
https://www.reddit.com/r/YouTubeStudio/

Just a suggestion, as I am not registered there, and don't use YouTube Studio, only with /firefox/ .

is this a solution?

Make sure you are not blocking content.

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

One issue that seems more common lately is Firefox's Tracking Protection feature. When it is blocking content in a page, a shield icon will appear at the left end of the address bar next to the padlock icon. This article has more info on managing this feature: Tracking Protection {web link}

hello......

(ottoman),

please read and follow the given link :

Chosen Solution Does it help if you disable hardware acceleration?

Try to set the gfx.content.azure.enabled pref to false or if this didn't help disable Direct2D by setting the gfx.direct2d.disabled pref to true on the about:config page and leave hardware acceleration otherwise enabled.

1. /questions/942265 Font is messed up on Firefox 17.0
2. [http://kb.mozillazine.org/about:config]

I hope resolve the problem please reply me back.

Thank you!

Make sure you are not blocking content. Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there? One issue that seems more common lately is Firefox's Tracking Protection feature. When it is blocking content in a page, a shield icon will appear at the left end of the address bar next to the padlock icon. This article has more info on managing this feature: Tracking Protection {web link}

this problem has nothing to do with it.

hello...... (ottoman), please read and follow the given link : Chosen Solution Does it help if you disable hardware acceleration? Try to set the gfx.content.azure.enabled pref to false or if this didn't help disable Direct2D by setting the gfx.direct2d.disabled pref to true on the about:config page and leave hardware acceleration otherwise enabled.

1. /questions/942265 Font is messed up on Firefox 17.0
2. [http://kb.mozillazine.org/about:config]

I hope resolve the problem please reply me back. Thank you!

Why do you write the automatic answers of 7 years ago here. Firefox has changed a lot in 7 years. What you write has nothing to do with the solution.

hii

please try these steps to Customize blurring

   Sign in to YouTube Studio.
   From the left menu, select Videos.
   Click the video you’d like to edit.
   From the left menu, click Editor.
   Click ADD BLUR.
   Next to “Custom blurring” click Edit.
   Hover over the video and click Pause  .
   Click and drag the box to adjust the blur. 
   Click Done.
   Click Save.

The tool will automatically blur the object as it moves. You can also:

   Move the blurred box to a different place: Click and drag within the box.
   Resize the blurred area: Click and drag any corner of the box to blur a bigger or smaller area.
   Change when the blurring happens: Click and drag the ends of the timeline to set when the blurring begins and ends.
   Prevent the blurred area from moving at all: Click Lock in the timeline to make sure the blurred area always stays in the same place.
   Blur multiple areas: Click and drag new boxes over the parts you want to blur.

for the Blur faces

   Sign in to YouTube Studio.
   From the left menu, select Videos.
   Click the video you’d like to edit.
   From the left menu, click Editor.
   Click GET STARTED.
   Click ADD BLUR.
   Next to “Blur faces” click Edit.
   Once processing is complete, click the thumbnails of the faces you’d like to blur.
   Click Save.
   Click Save again.​

hii please try these steps to Customize blurring Sign in to YouTube Studio. From the left menu, select Videos. Click the video you’d like to edit. From the left menu, click Editor. Click ADD BLUR. Next to “Custom blurring” click Edit. Hover over the video and click Pause . Click and drag the box to adjust the blur. Click Done. Click Save. The tool will automatically blur the object as it moves. You can also: Move the blurred box to a different place: Click and drag within the box. Resize the blurred area: Click and drag any corner of the box to blur a bigger or smaller area. Change when the blurring happens: Click and drag the ends of the timeline to set when the blurring begins and ends. Prevent the blurred area from moving at all: Click Lock in the timeline to make sure the blurred area always stays in the same place. Blur multiple areas: Click and drag new boxes over the parts you want to blur. for the Blur faces Sign in to YouTube Studio. From the left menu, select Videos. Click the video you’d like to edit. From the left menu, click Editor. Click GET STARTED. Click ADD BLUR. Next to “Blur faces” click Edit. Once processing is complete, click the thumbnails of the faces you’d like to blur. Click Save. Click Save again.​

Really? You think I don't know this? read the question again

Doesn't YouTube studio have support for that online application? IMO, Google very purposely ignores comparability with Firefox, or just doesn't care how it works in anything except for "their" web browser, Chrome. Edge may work, too, only due to MS knuckling under to creating Edge from the Webkit / Blink browser core from the Chromium project which is what Google uses for Google Chrome. And beyond YouTube studio support, you might find help and knowledge over at reddit.
Just a suggestion, as I am not registered there, and don't use YouTube Studio, only with /firefox/ .

is this a solution?

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.

• https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• https://www.7tutorials.com/4-ways-boot-safe-mode-windows-10