Users and developers helping users with generic and technical Pale Moon issues on all operating systems.
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This board is for technical/general usage questions and troubleshooting for the Pale Moon browser only.
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 14:03
Operating system: Windows 7
Browser version: Pale Moon 33.7.1 AVX2 Build
32-bit or 64-bit browser?: 64-bit
Hello there, I've been trying to minimize GC pauses as much as possible for a smoother browsing experience, since I have powerful hardware with 48GB of RAM. What pushed me to do this is Pale Moon's laggy JavaScript engine.
I wanted to get confirmation from more experienced people here on whether my JavaScript flags in user.js are fine for this purpose or if I should make more changes to them?
Code: Select all
// JAVASCRIPT TWEAKS
// >>>>>>>>>>>>>>>>>>>>>
user_pref("jsloader.reuseGlobal", true);
user_pref("javascript.options.unboxed_objects", true);
user_pref("javascript.options.discardSystemSource", true);
user_pref("javascript.options.mem.gc_allocation_threshold_mb", 4000);
user_pref("javascript.options.mem.gc_compacting", false);
user_pref("javascript.options.mem.gc_generational", false);
user_pref("javascript.options.mem.gc_max_empty_chunk_count", 1000);
user_pref("javascript.options.mem.gc_min_empty_chunk_count", 200);
user_pref("javascript.options.mem.gc_per_zone", false);
user_pref("javascript.options.mem.gc_refresh_frame_slices_enabled", false);
user_pref("javascript.options.mem.gc_low_frequency_heap_growth", 4000);
user_pref("javascript.options.mem.gc_high_frequency_time_limit_ms", 5000);
user_pref("javascript.options.mem.gc_high_frequency_heap_growth_min", 2000);
user_pref("javascript.options.mem.gc_high_frequency_high_limit_mb", 2000);
user_pref("javascript.options.mem.gc_high_frequency_heap_growth_max", 2000);
user_pref("javascript.options.mem.high_water_mark", 2048);
user_pref("javascript.options.mem.gc_incremental_slice_ms", 50);
user_pref("dom.cycle_collector.incremental", true);
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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sidology
- Moon lover

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by sidology » 2025-05-10, 15:39
I didn't know there are (official) Windows 7 AMD drivers for 5700X3D?
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 16:18
sidology wrote: ↑2025-05-10, 15:39
I didn't know there are (official) Windows 7 AMD drivers for 5700X3D?
My mobo provides official drivers for Win7 and they happen to work for Zen 3:
https://www.asus.com/motherboards-compo ... B450M-A-II
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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back2themoon
- Moon Magic practitioner

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by back2themoon » 2025-05-10, 17:02
I could be wrong, but I think Pale Moon is best served by CPU's that excel in single-thread/process performance. While your CPU is of course powerful, I don't believe it falls into that category no matter how much RAM you throw at it.
Not that it should lag or anything. I personally wouldn't touch those settings. Also:
viewtopic.php?f=3&t=49
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 17:18
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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back2themoon
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by back2themoon » 2025-05-10, 18:16
Yes, that's a lot of extensions that
may cause performance issues. Have you tried with a clean profile (or clean
Pale Moon portable) to see if there is a significant performance improvement?
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 18:54
back2themoon wrote: ↑2025-05-10, 18:16
Have you tried with a clean profile (or clean
Pale Moon portable) to see if there is a significant performance improvement?
Yup, I still have a laggy browsing experience.
However, this is probably unrelated, but I noticed that AzureCanvasAccelerated is always 0. Isn't it supposed to be 1, especially on modern hardware like mine?
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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back2themoon
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by back2themoon » 2025-05-10, 19:03
Some "big" websites mostly meant for Chrome (e.g. YouTube) will lag no matter what. You have to provide URL examples of those laggy experiences.
The non-modern factor of Windows 7 I guess should also be considered here. I use an ancient system (15+ years) on W10 with no significant problems although yes, some websites will struggle. But they are in the minority.
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 19:23
back2themoon wrote: ↑2025-05-10, 19:03
You have to provide URL examples of those laggy experiences.
I encounter lags on JS-heavy websites such as YouTube, while other websites with minimal JS work fine.
back2themoon wrote: ↑2025-05-10, 19:03
The non-modern factor of Windows 7 I guess should also be considered here. I use an ancient system (15+ years) on W10 with no significant problems although yes, some websites will struggle. But they are in the minority.
I don't think this has anything to do with Windows 7 because if it did then other browsers would struggle too. I also ran benchmarks in the past on a Turkish tech forum
https://www.techolay.net/sosyal/konu/wi ... ark.29049/ where Windows 7 outperformed Windows 11 in most tests.
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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back2themoon
- Moon Magic practitioner

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by back2themoon » 2025-05-10, 19:35
As mentioned, you won't have much luck with YouTube. There are several tips on the forum, and you may find userscripts, filterlists etc. that could help with specific problem websites. I use those few "corporate" made-for-Chrome websites like YT, Facebook etc. on Firefox (which is not fully supported either, in some cases). No point in fighting them.
It's not that simple.
You have the hardware. I'd clean-install W10 if I were you (and stay away from W11). It will make better use of your PC.
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Moonchild
- Pale Moon guru

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by Moonchild » 2025-05-10, 22:55
One critical note is that your
user.js is obviously (based on) one of those Firefox tweaking guide ones. In relation to that see the following warning on our website:
Pale Moon website - Technical - Firefox differences wrote:Pale Moon may behave differently when certain advanced configuration preferences are changed. Never assume that what applies to Firefox also applies to Pale Moon; in many cases it does not.
Note that "internet speed boosters" and general "tweak guides" written for Firefox can actually
harm Pale Moon's speed as the configuration defaults are made with in-depth knowledge of the browser back-end and "a higher number" or "bigger buffer" isn't always better.
You are strongly advised to always use defaults as supplied in Pale Moon.
So, if you want to tweak, then tweak from a clean slate, not from a jumble of altered preferences.
"A dead end street is a place to turn around and go into a new direction" - Anonymous
"Seek wisdom, not knowledge. Knowledge is of the past; wisdom is of the future." -- Native American proverb
"Linux makes everything difficult." -- Lyceus Anubite
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 23:05
Moonchild wrote: ↑2025-05-10, 22:55
One critical note is that your
user.js is obviously (based on) one of those Firefox tweaking guide ones.
It's not a user.js from Firefox tweaking guides. It's just my customized version of this user.js:
https://git.nixnet.services/Narsil/palemoon_user.js
If you wanna check it out, here's a download link to my user.js:
https://www.mediafire.com/file/gxbs0p0wxetz086/user.js
Last edited by MasterSlenderTR on 2025-05-10, 23:26, edited 2 times in total.
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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MasterSlenderTR
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by MasterSlenderTR » 2025-05-10, 23:15
back2themoon wrote: ↑2025-05-10, 19:35
As mentioned, you won't have much luck with YouTube. There are several tips on the forum, and you may find userscripts, filterlists etc. that could help with specific problem websites. I use those few "corporate" made-for-Chrome websites like YT, Facebook etc. on Firefox (which is not fully supported either, in some cases). No point in fighting them.
Where can I find those tips? The forum has too many threads.
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moonbat
- Knows the dark side

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by moonbat » 2025-05-11, 01:19
Which seems to be derived from the Arkenfox hardening script. There is no hardening required for Pale Moon (regardless of what the idiot at spyware.neocities.org may claim).
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back2themoon
- Moon Magic practitioner

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by back2themoon » 2025-05-11, 09:15
MasterSlenderTR wrote: ↑2025-05-10, 23:15
Where can I find those tips? The forum has too many threads.
Sorry, I can't do that for you. Go to
Advanced search, enable "Topic titles only" and search for youtube. That would be a good start but like I already said: don't expect miracles. YouTube and others are not optimized for Pale Moon. At all.
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gabrgv
- Moonbather

- Posts: 54
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by gabrgv » 2025-05-11, 16:48
All the cool kids are using
VORAPIS/V3 nowadays. It’s a userscript that restores the old YouTube layout and, as a side effect, increases drastically the performance.
E. g.,
one time it was mentioned here in the forum.
The cooler kids though use a YouTube front-end called
Invidious.
Another thing you can do to improve performance is to disable javascript in some sites. For instance, I know that Amazon and IMDb work without javascript (few things will be missing). Use the uBlock Origin extension to do so.
Thanks for that, I’ll check it out, although mine is already pretty much hardened.
Off-topic:
Nice desktop, by the way.
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back2themoon
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by back2themoon » 2025-05-11, 19:50
Having said the above, I find that even on my ancient CPU, YT actually works fairly well.
I avoid its main page, and every page that contains many videos. These make my PM struggle and it's not worth it. But, single video pages work good enough and actually utilise the GPU much better than Firefox. They even look better without that god-awful glossy feel and rendering of "modern" Firefox, and pretty much every other "modern", mobile-friendly program app.
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MasterSlenderTR
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by MasterSlenderTR » 2025-05-11, 20:00
back2themoon wrote: ↑2025-05-11, 09:15
Sorry, I can't do that for you. Go to
Advanced search, enable "Topic titles only" and search for youtube. That would be a good start but like I already said: don't expect miracles.
Thanks, I will check it out.

RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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MasterSlenderTR
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by MasterSlenderTR » 2025-05-11, 20:04
gabrgv wrote: ↑2025-05-11, 16:48
The cooler kids though use a YouTube front-end called
Invidious.
I had been using Invidious for months, but I got tired of instances randomly shutting down without warning. Not to mention, average Invidious instance is slow af when it comes to HD videos.
Vorapis doesn't seem to load videos.

Last edited by MasterSlenderTR on 2025-05-11, 20:19, edited 1 time in total.
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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MasterSlenderTR
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by MasterSlenderTR » 2025-05-11, 20:16
gabrgv wrote: ↑2025-05-11, 16:48
Off-topic:
Nice desktop, by the way.
Off-topic:
Thanks, it took me a while to set up my theme.
Last edited by MasterSlenderTR on 2025-05-11, 22:49, edited 1 time in total.
RTX 3060 Ti | Ryzen 7 5700x3d | ASUS Prime B450M-A II | 48GB DDR4 RAM | Windows 7

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