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Update process count preference to a fixed value and enhance content parent selection logic

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ownedbywuigi 2026-03-30 11:43:16 +01:00
commit 9a60e2c532
2 changed files with 16 additions and 5 deletions
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6
application/basilisk/app/profile/basilisk.js
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@ -923,10 +923,8 @@ pref("browser.tabs.remote.force-disable", false);
pref("browser.tabs.remote.desktopbehavior", true);
pref("browser.tabs.remote.ignoreBlockPolicy", true);
// Number of web content processes used by e10s.
// -1 means automatic tab-isolation mode: try one process per tab.
pref("dom.ipc.processCount", -1);
// Safety ceiling used by automatic tab-isolation mode.
pref("dom.ipc.processCount.webIsolatedMax", 64);
// Keep this at a fixed value in this tree; automatic -1 mode is not supported.
pref("dom.ipc.processCount", 4);
// This pref governs whether we attempt to work around problems caused by
// plugins using OS calls to manipulate the cursor while running out-of-

15
dom/ipc/ContentParent.cpp
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@ -602,14 +602,27 @@ ContentParent::GetNewOrUsedBrowserProcess(bool aForBrowserElement,
static_cast<uint32_t>(maxContentParents));
uint32_t startIdx = rand() % maxSelectable;
uint32_t currIdx = startIdx;
RefPtr<ContentParent> fallback;
do {
RefPtr<ContentParent> p = (*contentParents)[currIdx];
NS_ASSERTION(p->IsAlive(), "Non-alive contentparent in sBrowserContntParents?");
if (!p->IsAlive()) {
currIdx = (currIdx + 1) % maxSelectable;
continue;
}
if (!fallback) {
fallback = p;
}
if (p->mOpener == aOpener) {
return p.forget();
}
currIdx = (currIdx + 1) % maxSelectable;
} while (currIdx != startIdx);
if (fallback) {
return fallback.forget();
}
}
RefPtr<ContentParent> p = new ContentParent(aOpener, aForBrowserElement);