What can I say...
1) It is more convenient to explore the direct link.
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https://syndication.twitter.com/srv/timeline-profile/screen-name/michaeljackson?dnt=false&frame=false&hideBorder=false&hideFooter=false&hideHeader=false&hideScrollBar=false&lang=en&showHeader=true&showReplies=false&theme=dark&transparent=false
https://ftp.mozilla.org/pub/firefox/rel ... n64/en-US/
https://ftp.mozilla.org/pub/firefox/rel ... n64/en-US/
3) I used a launcher that disables e10s and runs Firefox in "portable" mode. Just extract "Firefox Setup xxx.exe" using 7-zip and place the batch file near the "core" folder.
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@echo off
set PGM_CORE=Core
set PGM_NAME=Firefox
rem set PGM_HOME_URL=
set ABS_PATH=%~dp0
set PGM_EXE=%ABS_PATH%%PGM_CORE%\%PGM_NAME%.exe
set USER_PROF=%ABS_PATH%%USERNAME%
set DNLDS_DIR=%ABS_PATH%Downloads
set MOZILLA_PLUGINS=%ABS_PATH%Plugins
set JAVA_PLUGINS=%ABS_PATH%Plugins\Java
IF NOT EXIST "%PGM_EXE%" EXIT
IF EXIST "%ABS_PATH%%PGM_CORE%\updater.exe" ren "%ABS_PATH%%PGM_CORE%\updater.exe" "updater.exe.old"
IF EXIST "%ABS_PATH%%PGM_CORE%\updater.ini" ren "%ABS_PATH%%PGM_CORE%\updater.ini" "updater.ini.old"
IF NOT EXIST "%USER_PROF%" md "%USER_PROF%"
IF NOT EXIST "%DNLDS_DIR%" md "%DNLDS_DIR%"
IF NOT EXIST "%MOZILLA_PLUGINS%" md "%MOZILLA_PLUGINS%"
IF NOT EXIST "%JAVA_PLUGINS%" md "%JAVA_PLUGINS%"
set USER_JS=%USER_PROF%\user.js
echo user_pref("browser.cache.disk.enable", false); >"%USER_JS%"
echo user_pref("plugin.expose_full_path", true); >>"%USER_JS%"
echo user_pref("extensions.enabledScopes", 5); >>"%USER_JS%"
echo user_pref("browser.download.useDownloadDir", false); >>"%USER_JS%"
echo user_pref("browser.download.manager.retention", 1); >>"%USER_JS%"
echo user_pref("browser.shell.checkDefaultBrowser", false); >>"%USER_JS%"
echo user_pref("browser.taskbar.lists.enabled", false); >>"%USER_JS%"
echo user_pref("app.update.auto", false); >>"%USER_JS%"
echo user_pref("app.update.enabled", false); >>"%USER_JS%"
echo user_pref("browser.cache.disk.parent_directory", "%USER_PROF:\=\\%"); >>"%USER_JS%"
echo user_pref("browser.download.lastDir", "%DNLDS_DIR:\=\\%"); >>"%USER_JS%"
IF DEFINED PGM_HOME_URL echo user_pref("browser.startup.homepage", "%PGM_HOME_URL%"); >>"%USER_JS%"
echo user_pref("browser.tabs.remote.autostart", false); >>"%USER_JS%"
echo user_pref("browser.tabs.remote.force-enable", false); >>"%USER_JS%"
echo user_pref("dom.ipc.processCount", 1); >>"%USER_JS%"
echo user_pref("devtools.chrome.enabled", true); >>"%USER_JS%"
echo user_pref("devtools.debugger.remote-enabled", true); >>"%USER_JS%"
echo user_pref("dom.always_stop_slow_scripts", true); >>"%USER_JS%"
echo user_pref("dom.max_script_run_time", 20); >>"%USER_JS%"
set XRE_PROFILE_LOCAL_PATH=%USER_PROF%
set XRE_PROFILE_PATH=%USER_PROF%
set MOZ_FORCE_DISABLE_E10S=1
set MOZ_NO_REMOTE=1
set MOZ_PLUGIN_PATH=%MOZILLA_PLUGINS%;%JAVA_PLUGINS%
start "%PGM_NAME% Portable" "%PGM_EXE%" -–disable-e10s
It is possible that the images are loading and resizing slowly. Maybe the reason is SVG without dimensions. Also, maybe when the page is loaded, some unnecessary events are generated, the processing of which takes a lot of time. Maybe it's extra "load" events or something related to ResizeObserver.