1706508 - YouTube pages now change the appearance of the scroll bar: can we have an option to prevent this?

Status: RESOLVED INCOMPLETE

(Firefox :: Untriaged, enhancement)

Description

[rikardo.new]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0

Steps to reproduce:

Visited a YouTube page

Actual results:

Scrollbar shows no arrowhead buttons at top and bottom.

Expected results:

Scrollbar should appear as usual, with arrowhead buttons at top and bottom.
Can we have an option to prevent pages from interfering with the appearance of window components (like the old option to prevent pages from hiding the status bar)?

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Nicolas Silva [:nical]]

I don't know what component theming related stuff should go in. Back to untriaged.

Comment 3

[Jonathan Kew [:jfkthame]]

I guess the issue here is that youtube is specifically styling the scrollbar, and the reporter wants to be able to prevent that. I'm not sure how/where that would be exposed... I assume they're just using CSS properties to achieve the look they want.

(Having said that, I do see top/bottom arrowheads on the scrollbar on youtube.com on Windows; maybe they're A/B-testing different designs?)

Comment 4

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: arrow.JPG

Hi Rikardo,

Can you please add a screenshot of the problem?
I'm attaching what I'm seeing at the moment. Please confirm if these are the arrows missing in your case.

Best,

Clara

Comment 5

[rikardo.new]

Attachment: How YouTube looked in my Firefox for a few days

Comment 6

[rikardo.new]

Attachment: How YouTube looks in my Firefox today

Comment 7

[rikardo.new]

Hi Clara, Jonathan, Nicholas and all,

Thanks for giving some of your attention to my request. As you can tell, I'm still learning how to use this comments sytem.

My first attachment in comment 5 shows a YouTube page in Firefox with no visible arrowheads.
After submitting the request I found that clicking where the arrowheads should be had the right effect - scrolling in small steps - although the arrow heads were not visible.

Today (22 April) the arrowheads have reappeared - see comment 6 - and the behaviour is as expected.
Maybe today's change is related to FF updating itself to version 88 this morning.

For now at least the problem seems to have gone away so I suppose this request can take low priority - if it's even possible for web pages to affect scrollbars like that.

Regards,
Rikardo

Comment 8

[Clara Guerrero ( Need Info Brindusa Tot Please)]

So, this only happened in youtube? You would see the arrows in other websites, using same version of ff browser?

Clara

Comment 9

[George [:fozzie]]

(In reply to Jonathan Kew (:jfkthame) from comment #3)

I guess the issue here is that youtube is specifically styling the scrollbar, and the reporter wants to be able to prevent that. I'm not sure how/where that would be exposed... I assume they're just using CSS properties to achieve the look they want.

(Having said that, I do see top/bottom arrowheads on the scrollbar on youtube.com on Windows; maybe they're A/B-testing different designs?)

This is definitely possible with JavaScript. Unlike WebKit (including Blink) , Firefox only has limited support for scrollbar styling via CSS which doesn't include the styling of the scrollbar buttons.

Now whether this is intended behaviour is a different question but it has been possible via JavaScript for years now.

Comment 10

[rikardo.new]

I noticed this behaviour only in YouTube.
I regret not having had the presence of mind to actively check the behaviour when visiting other websites.
However, I definitely saw (and used) the usual arrowheads in Google search result pages in the same period as when the arrowheads were not visible on YouTube pages, using FF v87.
R.

Comment 11

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Rikardo,
Can you please check the following?
1- Does this issue happen with a new profile? Here is a link on how to create a new profile: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2- Are you using add-ons? If so could you please list them? (you can try the issue while in Safe Mode. You can find helpful info here : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode .)
3- Does this issue occur in the latest nightly version of firefox? Here is a link from where you can download it: https://www.mozilla.org/en-US/firefox/channel/desktop/

Thanks for the report.
Best regards, Clara.

Comment 12

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Hi,

I'm marking this as Resolved-Incomplete due to lack of response. If the issue is still reproducible with the latest Firefox version, feel free to reopen the bug with more information.

Regards, Clara.