My Browser Builds (Part 5)

[user57]

9 hours ago, modnar said:

Thank you both for your answers; I wonder is there any other compiler that would be more flexible? Need you really use Microslop™ compiler?

the compiler has to translate like c, java, phyton whatever to a machine code

this code is by far not perfect.

a solution to avoid this is to write that programm in assembly - smaller, faster - but a lot more to write - and a lots of math and logic

 

the same goes for MMX,SSE, AVX

the compiler probaly just cant write a 100 % code in avx 

if you really want that you would have to write the entire programm (in this case entire windows10/11) in assembly (aka AVX assembly code) - sounds impossible to me

 

c is relativ a lot more near to assembly , java and phyton are script and engine-ish - even then phyton, java would call their functions (then it is already gone away from a real avx/assembly solution)

c/c++ is faster then scripts - a well known old problem

 

but important to say these new c++17 c++21 use engines and scripts - i would not call this c/c++ anymore - its getting a so called "high-language" - a high-language is a other word for a script or easier and in most cases slower solution

[modnar]

10 hours ago, user57 said:

...

but important to say these new c++17 c++21 use engines and scripts - i would not call this c/c++ anymore - its getting a so called "high-language" - a high-language is a other word for a script or easier and in most cases slower solution

Thank you for a good explanation. I guess it's Microslop™ at work again turning even good things into, well, slop. Sigh.

[roytam1]

New build of Serpent/UXP for XP!

Test binary:
Win32 https://o.rthost.win/basilisk/basilisk52-g4.8.win32-git-20260328-3219d2d-uxp-956cd0a5cc-xpmod.7z
Win64 https://o.rthost.win/basilisk/basilisk52-g4.8.win64-git-20260328-3219d2d-uxp-956cd0a5cc-xpmod.7z

source code that is comparable to my current working tree is available here: https://github.com/roytam1/UXP/commits/custom

IA32 Win32 https://o.rthost.win/basilisk/basilisk52-g4.8.win32-git-20260328-3219d2d-uxp-956cd0a5cc-xpmod-ia32.7z

source code that is comparable to my current working tree is available here: https://github.com/roytam1/UXP/commits/ia32

NM28XP build:
Win32 https://o.rthost.win/palemoon/palemoon-28.10.7a1.win32-git-20260328-d849524bd-uxp-956cd0a5cc-xpmod.7z
Win32 IA32 https://o.rthost.win/palemoon/palemoon-28.10.7a1.win32-git-20260328-d849524bd-uxp-956cd0a5cc-xpmod-ia32.7z
Win32 SSE https://o.rthost.win/palemoon/palemoon-28.10.7a1.win32-git-20260328-d849524bd-uxp-956cd0a5cc-xpmod-sse.7z
Win64 https://o.rthost.win/palemoon/palemoon-28.10.7a1.win64-git-20260328-d849524bd-uxp-956cd0a5cc-xpmod.7z
Win7+ x64 AVX2 https://o.rthost.win/palemoon/palemoon-28.10.7a1.win64-git-20260328-d849524bd-uxp-956cd0a5cc-w7plus-avx2.7z

Official UXP changes picked since my last build:
- Cloudflare Image Resizing fix (c8460ae3e7)
- Issue #3016 - allow url.CanParse to use custom-scheme bases to match current spec (a704425358)
- Issue #2551 - implement TypedArray.prototype.with (3d131186be)
- Issue #3011 - Part 1: Add As{Text|Html}Editor() and AsEditorBase() (2f20100059)
- Issue #3011 - Part 2: Switch spellchecker root to Shadow DOM. (e701dad7ef)
- Issue #3011 - Part 3: Handle edge case for spellchecking. (964a72079a)
- Issue #3020 - document.currentScript should be null in modules (94ffd74cab)
- Issue #3020 - Update `currentScript` when dealing with shadow DOM. (eee99b32cc)
- Issue #3020 - Clear currentScript after running microtasks (fdee9737a8)
- Issue #2548 - Part 1 - Implement MathML DOM and pre-requisites. https://bugzilla.mozilla.org/show_bug.cgi?id=1571487 Introduce interface mixins. https://bugzilla.mozilla.org/show_bug.cgi?id=1414372 Switch XPathEvaluator to using IDL mixins and remaining users of IDL "implements" over to mixin syntax. https://bugzilla.mozilla.org/show_bug.cgi?id=1574195 Introduce GlobalEventHandlers/DocumentAndElementEventHandlers/ElementCSSInlineStyle mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1579457 Introduce DocumentAndElementEventHandlers to more closely align with the HTML spec. https://bugzilla.mozilla.org/show_bug.cgi?id=1330457 Remove the use of IsCallerChrome in FetchRequest. https://bugzilla.mozilla.org/show_bug.cgi?id=1335368 (85600c7378)
- Issue #2548 - Part 2 - Collection of WebIDL parsing updates in an attempt to fix partial interface mixin error. We should ensure, at build-time, that partial interfaces are defined in the same file as the interface they extend. Since our build system doesn't really support correct dep builds if they're placed in a different file. https://bugzilla.mozilla.org/show_bug.cgi?id=1333117 WebIDL: Better error message for trying to inherit from a mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1575384 Fix webidl identifier conflicts involving typedefs to produce saner exceptions. https://bugzilla.mozilla.org/show_bug.cgi?id=1531623 Disallow nullable types for WebIDL constants. https://bugzilla.mozilla.org/show_bug.cgi?id=1535647 Add support for extended attributes on types in Web IDL https://bugzilla.mozilla.org/show_bug.cgi?id=1359269 Allow LenientFloat to be only in a specific overload https://bugzilla.mozilla.org/show_bug.cgi?id=1020975 (81b4f0c352)
- Issue #2548 - Part 3 - Fix some MathML issues encountered since WebIDL works. Add an nsContentUtils API for getting the CallerType of a JSContext. https://bugzilla.mozilla.org/show_bug.cgi?id=1316616 Also added a Fetch() change that was not in the Mozilla patch. (20354b672f)
- Issue #2548 - Part 4 - Fix some missed changes for ElementCSSInlineStyle. Introduce GlobalEventHandlers/DocumentAndElementEventHandlers/ElementCSSInlineStyle mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1579457 (502c704770)
- Issue #2548 - Part 5 - Implement the HTMLOrForeignElement mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1577660 Add 'preventScroll' option to HTMLElement's, SVGElement's and XULElement's 'focus' method. https://bugzilla.mozilla.org/show_bug.cgi?id=1374045 (3febe21f99)

No official Pale-Moon changes picked since my last build.

No official Basilisk changes picked since my last build.

Update Notice:
- You may delete file named icudt*.dat and icu63.dll inside program folder when updating from old releases.

* Notice: From now on, UXP rev will point to `custom` branch of my UXP repo instead of MCP UXP repo, while "official UXP changes" shows only `tracking` branch changes.

[roytam1]

New build of BOC/UXP for XP!

Test binary:
MailNews Win32 https://o.rthost.win/boc-uxp/mailnews.win32-20260328-40a79c75-uxp-956cd0a5cc-xpmod.7z
BNavigator Win32 https://o.rthost.win/boc-uxp/bnavigator.win32-20260328-40a79c75-uxp-956cd0a5cc-xpmod.7z

source repo (excluding UXP): https://github.com/roytam1/boc-uxp/tree/custom

* Notice: the profile prefix (i.e. parent folder names) are also changed since 2020-08-15 build, you may rename their names before using new binaries when updating from builds before 2020-08-15.

--

New build of HBL-UXP for XP!

Test binary:
IceDove-UXP(mail) https://o.rthost.win/hbl-uxp/icedove.win32-20260328-id-656ea98-uxp-956cd0a5cc-xpmod.7z
IceApe-UXP(suite) https://o.rthost.win/hbl-uxp/iceape.win32-20260328-id-656ea98-ia-c642e3c-uxp-956cd0a5cc-xpmod.7z

source repo (excluding UXP):
https://github.com/roytam1/icedove-uxp/tree/winbuild
https://github.com/roytam1/iceape-uxp/tree/winbuild

[roytam1]

New build of post-deprecated Serpent/moebius for XP!
* Notice: This repo will not be built on regular schedule, and changes are experimental as usual.
** Current moebius patch level should be on par with 52.9, but some security patches can not be applied/ported due to source milestone differences between versions.

Test binary:
Win32 https://o.rthost.win/basilisk/basilisk55-win32-git-20260328-eb31645dc-xpmod.7z
Win64 https://o.rthost.win/basilisk/basilisk55-win64-git-20260328-eb31645dc-xpmod.7z

repo: https://github.com/roytam1/basilisk55

Repo changes:
- ported from UXP: Cloudflare Image Resizing fix (c8460ae3) (2d69b6c88)
- ported from UXP: Issue #3016 - allow url.CanParse to use custom-scheme bases to match current spec (a7044253) (0fd3dc434)
- ported from UXP: Issue #2551 - implement TypedArray.prototype.with (3d131186) (1b04d4b0b)
- ported from UXP: Issue #3011 - Part 1: Add As{Text|Html}Editor() and AsEditorBase() (2f201000) (76bf4dc35)
- ported from UXP: Issue #3011 - Part 2: Switch spellchecker root to Shadow DOM. (e701dad7) (984b6e3c3)
- import from UXP: Issue #3011 - Part 3: Handle edge case for spellchecking. (964a7207) (bbe59f5fe)
- import from UXP: Issue #3020 - document.currentScript should be null in modules (94ffd74c) (fc00851a7)
- import from UXP: Issue #3020 - Update `currentScript` when dealing with shadow DOM. (eee99b32) (0db6bb4b5)
- import from UXP: Issue #3020 - Clear currentScript after running microtasks (fdee9737) (c7997448b)
- ported from UXP:
 - Issue #2548 - Part 1 - Implement MathML DOM and pre-requisites. https://bugzilla.mozilla.org/show_bug.cgi?id=1571487 Introduce interface mixins. https://bugzilla.mozilla.org/show_bug.cgi?id=1414372 Switch XPathEvaluator to using IDL mixins and remaining users of IDL "implements" over to mixin syntax. https://bugzilla.mozilla.org/show_bug.cgi?id=1574195 Introduce GlobalEventHandlers/DocumentAndElementEventHandlers/ElementCSSInlineStyle mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1579457 Introduce DocumentAndElementEventHandlers to more closely align with the HTML spec. https://bugzilla.mozilla.org/show_bug.cgi?id=1330457 Remove the use of IsCallerChrome in FetchRequest. https://bugzilla.mozilla.org/show_bug.cgi?id=1335368 (85600c73)
 - Issue #2548 - Part 2 - Collection of WebIDL parsing updates in an attempt to fix partial interface mixin error. We should ensure, at build-time, that partial interfaces are defined in the same file as the interface they extend. Since our build system doesn't really support correct dep builds if they're placed in a different file. https://bugzilla.mozilla.org/show_bug.cgi?id=1333117 WebIDL: Better error message for trying to inherit from a mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1575384 Fix webidl identifier conflicts involving typedefs to produce saner exceptions. https://bugzilla.mozilla.org/show_bug.cgi?id=1531623 Disallow nullable types for WebIDL constants. https://bugzilla.mozilla.org/show_bug.cgi?id=1535647 Add support for extended attributes on types in Web IDL https://bugzilla.mozilla.org/show_bug.cgi?id=1359269 Allow LenientFloat to be only in a specific overload https://bugzilla.mozilla.org/show_bug.cgi?id=1020975 (81b4f0c3)
 - Issue #2548 - Part 3 - Fix some MathML issues encountered since WebIDL works. https://bugzilla.mozilla.org/show_bug.cgi?id=1316616 Also added a Fetch() change that was not in the Mozilla patch. (20354b67)
 - Issue #2548 - Part 4 - Fix some missed changes for ElementCSSInlineStyle. Introduce GlobalEventHandlers/DocumentAndElementEventHandlers/ElementCSSInlineStyle mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=157945 (502c7047)
 - Issue #2548 - Part 5 - Implement the HTMLOrForeignElement mixin. https://bugzilla.mozilla.org/show_bug.cgi?id=1577660 Add 'preventScroll' option to HTMLElement's, SVGElement's and XULElement's 'focus' method. https://bugzilla.mozilla.org/show_bug.cgi?id=1374045 (3febe21f) (eb31645dc)

[RamonUn]

I got a crash with the latest IceApe-UXP, I was not able to reproduce it, but I have the `drwtsn32.log` file.

If needed I can also give you the `user.dmp` file.

drwtsn32.zip

[Ben Markson]

Serpent continues to get better but I still encounter the occasional site where the layout just won't render.
Here's a good example:

  https://ico.org.uk/for-the-public/

This makes a bit more sense:

  .umb-block-grid
  {
    --umb-block-grid--grid-columns: 0 !important;
  }

. . . but it's still pretty messy.

Can anybody see what is causing such a catastrophic layout failure?

Ben

[j7n]

In New Moon, I've noticed that Google autocomplete now only shows 1 line if I have scrolled a bit down the page of search results. The rest of the box is blank. Not that this is important because those autocompletes are very sanitized.

[modnar]

On 3/28/2026 at 9:04 AM, RamonUn said:

I got a crash with the latest IceApe-UXP, I was not able to reproduce it, but I have the `drwtsn32.log` file...

What if  you used MailNews (I use MailNews, by the way)?

[roytam1]

On 3/28/2026 at 4:04 PM, RamonUn said:

I got a crash with the latest IceApe-UXP, I was not able to reproduce it, but I have the `drwtsn32.log` file.

If needed I can also give you the `user.dmp` file.

drwtsn32.zip 37.72 kB · 0 downloads

looks like it tried to use a freed pointer, could be some kind of race condition.

but since you can't reproduce it (and so do I), this will be hard to be fixed.

[RamonUn]

I got this crash a few more times, but It does not come on demand.

[jumper]

Quote

https://www.sentinelone.com/labs/firefox-jit-use-after-frees-exploiting-cve-2020-26950/

// Crashes when (cons === interesting) because x2 is a freed // location and a10 is now 0xe5e5e5e5. assertEq(interesting.x2.a10, 10); } } f();

Exploiting CVE-2020-26950

0xe5e5e5e5 seems to be a JIT pseudo-handle related to CVE-2020-26950. Search DLL's Mozjs and Xul.

 

[j7n]

I just noticed that a Discourse forum can now be scrolled with the mouse normally in New Moon without workarounds.

[roytam1]

Notice for my source code users: I'm NOT going to merge upstream's python3 changeset.

Edited April 3 by roytam1

[VistaLover]

1 hour ago, roytam1 said:

I'm NOT going to merge upstream's python3 changeset.

... Is that about PR#3024 having been merged in 5f03b88 ? Will your decision be viable in the long run?

So long I understand, you compile your UXP builds on a Win7 SP1 x64 build machine, don't you? There exist CPython-3 forks that have restored support for WinVista+ (so Win7, too), e.g. 

https://github.com/adang1345/PythonVista

, will using such a py3 version during compilation render your browser builds not compatible with XPSP3/VistaSP2 ?

If the need arises, I've also come across some py3 builds (> py3.4) that are XPSP3+ compatible, like: 

https://github.com/R-YaTian/CPython3.6.15WinXP/releases/tag/3.6.15

https://github.com/R-YaTian/CPython3.7.17WinXP/releases/tag/3.7.17_final

https://github.com/R-YaTian/CPython3.8.20WinXP/releases/tag/v3.8.20_final

Edited April 3 by VistaLover