Being as I am now a 100% Linux user, the browser choices open to me are quite varied & interesting.

Under Ubuntu Mate 18.04.4 (64 bit) with WINE 5.x added is a very good place to be with regards to said choices, IMO.

As I type this out, I am using Mypal 27.8.3 (32-bit), and at the very same time I have Seamonkey 2.49.5 (Linux) open & minimized - and I have already completed my daily session with K-Meleon 75.1 Pro a bit earlier today.

Every so often I have tried the current release of Mypal, which for a while became clunky & slow to respond - and yesterday seemed like a great time to try again - so I did - and was pleasantly surprised...mostly.

That adventure began with Mypal 28.1.00 (64-bit), and it was VERY snappy !!
Just for yuks, I also grabbed & tried Mypal 28.1.00 (32-bit), and it was quite snappy as well.
Quite a pleasant change from the other in-between versions I have tried (and deleted from my HDD right afterwards).

Emboldened by the above, I also grabbed Centaury 2020.06.23 (64-bit) and all I can say about that browser is...
WOW.
Lots & lots & lots to like about that browser !!!

One single (sort of) pain point with all 3 of the above though=>
Playing YT videos without or with flash player installed is uselessly silly - the audio is all garbled so badly as to be nearly incomprehensible.
I suspect that this is because it defaults to HTML5 & does it rather poorly combined with my ignorance of how to change some setting(s) to have it use flash player instead.

Not a deal breaker for me because I seldom desire to watch YT videos & as funny as it may seem - K-Meleon 75.1 Pro still does a pretty good job with YT content (between crashes, of course...)((But Seamonkey does fine with the YT stuff)).

What would be seriously great IMO would be if Feodor2 would get into making native Linux releases of his fine work - given that Palemoon already has them - but for now this user has enough browsers to choose from, which also includes Borealis Navigator, Palemoon and Vivaldi if/when all the older/better types fail.

In conclusion:
Becoming a 100% Linux user has widened my available choices considerably.
Quitting windoze with XP was a perfect choice for me.
Now I am able to just open & run many 64 bit win7 apps 100% fine and WITHOUT having even so much as a VM of that eyesore of an OS.
This all is just perfect for me.

Good for you

Quote
smallhagrid
Playing YT videos without or with flash player installed is uselessly silly - the audio is all garbled so badly as to be nearly incomprehensible.
I suspect that this is because it defaults to HTML5 & does it rather poorly combined with my ignorance of how to change some setting(s) to have it use flash player instead.
K-Meleon 75.1 Pro still does a pretty good job with YT content (between crashes, of course...)((But Seamonkey does fine with the YT stuff)).

Do you intend to use flashplayer to play the only available mp4 and webm videos?
Since FLV on youtube isn't availably at all anymore since a few years, zero chance.
Google boss declared wants flash completely dead and of course he can happily do whatever he wants, having a monopoly (incl. requiring Chrome-exclusive code snippets for this and his other crucial websites, so they run as badly as possible on other browsers just without getting sued, to make visitors wrongly assume it were their browsers' fault and all flock over to Chrome too)

Of course I have no own experience with playing yt-videos live in the page, due to ancient OS, can only download the videos with a macro script (or helper sites) and play them locally. That works well enough (yet...), but only for allowed videos, not all. Oh well. But it's obvious the available formats extractable from the page source depend strictly on the useragent, at least in my case. That means with JS and all else strictly blocked, otherwise only freezing anyway. If JS is enabled, they may use deeper info to decide what to send.

Just saying: try if it helps to fake the useragent from Seamonkey in those other browsers too.
If possible, best get it at a yt page directly, to catch automatic site-UAs.
E.g. by injecting this snippet as bookmarklet, if possible, or in browser console, or scratchpad or whatever available and page-connected:

javascript:var x=navigator.userAgent; prompt(x,x);

Aside from that, the auto-chosen format may not only depend on browser settings, dimly remember having read somewhere that people can also right-click on (playing) videos to change settings? (or was that back in flash times, hmm not sure...)
But yeah, browser settings matter too, the prob is just: there are hundreds of media-related prefs!!
Look in about:config and filter for media, mp4, webm, ipc (plugin container stuff, async may be bad), webcomponents, test various settings, probably disable "mediasource" stuff (and windows-media-foundation??), perhaps ..plid.. (allows system np-plugins or not), disable prefetch stuff..., javascript.options.ion...
No idea, can't test myself, just tossing some prefs around as pointers, but every system needs different settings anyway.

Oh and just found this in my notes again: set "layers.low-precision-buffer=true" for youtube!
Someone posted awhile back this fixed youtube freezes for him! (now not sure anymore, which freezes exactly - perhaps that infamous 23min hickup in non-chrome browsers??)

Just for curiosity and own testing, could you post your various UA strings here?
Will probably get offered all the same formats for "modern" browsers, but who knows.



Edited 1 time(s). Last edit at 06/27/2020 11:39PM by siria.

Greetings Siria & thanks so much for your kind & thoughtful reply here !!

Just to be clear - YT is just a minor test that I do in any browser I consider, and only so that I know if that browser is useful for it (or not), this is a low priority function for me.

When I do view anything on YT it is done without any log-in as I prefer to avoid being 'product-ized' by the big G, and lately I was pointed to this lovely site via Panzer's terrific freeware thread here:
http://www.viewpure.com/
That is a real gem IMO !!

Regarding the OP here, I would happily contact Feodor2 & make my Linux suggestion to that person directly, BUT=>
I haven't seen any means of making contact except for these 2 internet locations:
Possible home site ??
Github
(And he/she doesn't appear to be a member here at all either, I searched.)

As to my UA...here's this one:
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.9) Gecko/20100101 Goanna/3.4 Firefox/52.9 PaleMoon/27.8.3
Here's Seamonkey:
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.5

I'll check the others as I use them again because I am curious as well !!

(offtopic)
Regarding youtube again, in old KM1.x the only way to still see the pages at all, in classic view,
is a bot useragent:
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Mozilla/5.0 (compatible; bingbot 2.0; +http://www.bing.com/bingbot.htm

smallhagrid,
I can send your message to Feodor's PM (at one of russian forums) if you need to get in contact with.

Hi Rodocop !!
Thanks for such a kind & thoughtful offer in your reply.

I don't have any real need to bother him directly, and would only hope that Feodor might visit this thread.
(Or even join this forum because I am sure many folks here also admire his works !!)

@Siria:

Just found this info...and used it for YT with success.

Ever since latest YT changes browser & CPU seriously choke on it in Seamonkey 2.49.5 .

I opened Waterfox instead, and installed:
https://addons.mozilla.org/firefox/addon/uaswitcher/

Changed UA to mimic Opera/mobile:
OPR/37.0.2192.105088 (Linux; Android 4.3; C5303 Build/12.1.A.1.207)

Amazing change !!
YT loaded without any problem - until more changes ??
We'll see, I guess.



Edited 1 time(s). Last edit at 07/08/2020 11:13PM by smallhagrid.

Quote
smallhagrid
@Siria:

Just found this info...and used it for YT with success.

Ever since latest YT changes browser & CPU seriously choke on it in Seamonkey 2.49.5 .

(...)

Same here. I don't know what is wrong with YT but Seamonkey 2.49.5 slow down for unknown reason.
Currently on my older laptop with Vista I'm using KMG, New Moon, Bnavigator, Serpent, MyPal and Centaury browsers.

__________________________________________
How to install Firefox addons in KM 76 RC:
http://kmeleonbrowser.org/forum/read.php?9,141979
Icons for Goanna KM/SM:
http://kmeleonbrowser.org/forum/read.php?10,150634
K-Meleon Quick Reference:
http://kmeleonbrowser.org/docs.php
Basilisk/KM/SM xpi converter:
https://www.addonconverter.fotokraina.com/
Best regards.

Greetings Luk3Z !!
Since I last posted here some things have been changed about my chosen browsers.

Still quite delighted with Ubuntu Mate & still use windoze apps via WINE, but...

No more Seamonkey - totally removed it & do not intend to try it again.
Over time it got more & more laggy whilst using more & more resources.
Went back to Thunderbird for email & that part is fine now.

As to browsers I am writing this via Mypal 27.8.3 - which is my preferred version since it is so light & fast - pretty much like KM used to be for me !!
Many sites do not open within it though - and for those I use Basilisk, which is also a real pleasure.
( https://www.basilisk-browser.org/ )

But...for stinky YT I now use Librewolf - which handles it the best IMO.
( https://librewolf-community.gitlab.io/install/ )

For sites that are real stinkers I also keep Vivaldi & Ungoogled Chromium on hand, but barely use those at all.

As long as there exist browsers which are very customizable & as light & quick as possible - those will be my chosen browsers - and depending upon how many more years I've left in me, when all the browsers have submitted to being chrome-ized (GACK !!!) maybe I'll be fortunate enough to have checked out of this mad world before then !!

Best Wishes.

I'm back to Seamonkey 2.49.5 for youtube coz I can skip Ads in the videos...
In Basilisk, BNavigator & New Moon I can't.

__________________________________________
How to install Firefox addons in KM 76 RC:
http://kmeleonbrowser.org/forum/read.php?9,141979
Icons for Goanna KM/SM:
http://kmeleonbrowser.org/forum/read.php?10,150634
K-Meleon Quick Reference:
http://kmeleonbrowser.org/docs.php
Basilisk/KM/SM xpi converter:
https://www.addonconverter.fotokraina.com/
Best regards.



Edited 1 time(s). Last edit at 07/01/2021 02:21PM by luk3Z.

Hello Again Luk3Z.
I'm pretty well 100% set against even trying Seamonkey again for myself.

Somebody did the great trick of slimming it down to browser only, which is a great idea, but even that isn't as good as I've found Librewolf to be:
https://librewolf-community.gitlab.io/

I use its appimage:
https://gitlab.com/librewolf-community/browser/appimage/-/releases

It opens quickly, closes without any gripes & is not even remotely close to how massively resource hoggy Seamonkey was.

It is the best thing I've used so far for more-obnoxious-than-ever-before YT & it is also smooth & quick for other video sites.

I added FVD Speed Dial & a couple of other 'normal' new type FF extensions & very happy with it.



Edited 1 time(s). Last edit at 07/02/2021 04:04AM by smallhagrid.

Thanks for your recommendation.
I need something for youtube videos.
I'll try it out. I also want to check Dooble web browser.

__________________________________________
How to install Firefox addons in KM 76 RC:
http://kmeleonbrowser.org/forum/read.php?9,141979
Icons for Goanna KM/SM:
http://kmeleonbrowser.org/forum/read.php?10,150634
K-Meleon Quick Reference:
http://kmeleonbrowser.org/docs.php
Basilisk/KM/SM xpi converter:
https://www.addonconverter.fotokraina.com/
Best regards.

I was using v87 & they are up to v89.2 - so I grabbed the newer APPIMAGE file, swapped names with the older file, made it executable - and viola - even better !!

The older version didn't allow about:config to be edited & I wanted backspace for back - and now I have it !!

Quoting a great page from Panzer's freeware link listing:

" A fork of Firefox, focused on privacy, security and freedom.
LibreWolf is indeed more private than Firefox as it removes all the telemetry Firefox has pre-configured."

https://dt.gl/privacy-cookbook-chapter-3-5-1-beyond-firefox-librewolf/

And fast...and does YT & other video sites very well too.



Edited 1 time(s). Last edit at 07/13/2021 08:32PM by smallhagrid.