Exception When Calling "emscripten_request_fullscreen" on iOS Firefox Only. Fails to go into Fullscreen Mode.

I am using OpenGL and SDL2 with emscripten, and when calling the function `emscripten_request_fullscreen("canvas", true);` it results in an exception on Firefox iOS only. The canvas does not go fullscreen and no OS messages indicate the fullscreen mode has been successful. Safari and Chrome on iOS work fine. Firefox and Chrome work fine on Android. All desktop systems and browsers are fine. I put an exception handler in the Javascript, however the exception is null and provides no information. Unfortunately I cannot find a way to remote debug Firefox on iOS, so I'm not sure how to get any other information. I've created a minimum reproduction project, which you can see below (after I click on the canvas to go fullscreen). Note that `emscripten_request_fullscreen_strategy` also has similar problems, depending on which settings you use, but none of them work on Firefox iOS.


[SimpleScreen.zip](https://github.com/emscripten-core/emscripten/files/11892151/SimpleScreen.zip)

You can just use the command `make` to compile or look in the make file, I don't think there is much unique there.

Any help would be appreciated.

**Version of emscripten/emsdk:**
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.34 (57b21b8fdcbe3ebb523178b79465254668eab408)
clang version 17.0.0 (https://github.com/llvm/llvm-project a031f72187ce495b9faa4ccf99b1e901a3872f4b)
Target: wasm32-unknown-emscripten
Thread model: posix

**Failing command line in full:**
Compiles fine.

**Full link command and output with `-v` appended:**
emcc -O2 main.cpp -s USE_SDL=2 -s MIN_WEBGL_VERSION=2 -s MAX_WEBGL_VERSION=2 -s FULL_ES3=1 -s ALLOW_MEMORY_GROWTH -s NO_DISABLE_EXCEPTION_CATCHING -v -o index.html --shell-file simple.html
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/clang" --version
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/clang++" -target wasm32-unknown-emscripten -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -DEMSCRIPTEN -I/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/SDL2 --sysroot=/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/compat -O2 -v main.cpp -c -o /tmp/emscripten_temp_2zqywp51/main_0.o
clang version 17.0.0 (https://github.com/llvm/llvm-project a031f72187ce495b9faa4ccf99b1e901a3872f4b)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /media/cybereality/Thrive/SDK/emsdk/upstream/bin
(in-process)
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/clang-17" -cc1 -triple wasm32-unknown-emscripten -emit-obj -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.cpp -mrelocation-model static -mframe-pointer=none -ffp-contract=on -fno-rounding-math -mconstructor-aliases -target-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -fcoverage-compilation-dir=/media/cybereality/Thrive/Projects/OpenGL/SimpleScreen -resource-dir /media/cybereality/Thrive/SDK/emsdk/upstream/lib/clang/17 -D EMSCRIPTEN -I /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/SDL2 -isysroot /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot -internal-isystem /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/c++/v1 -internal-isystem /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1 -internal-isystem /media/cybereality/Thrive/SDK/emsdk/upstream/lib/clang/17/include -internal-isystem /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten -internal-isystem /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include -O2 -fdeprecated-macro -fdebug-compilation-dir=/media/cybereality/Thrive/Projects/OpenGL/SimpleScreen -ferror-limit 19 -fvisibility=default -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -vectorize-loops -vectorize-slp -iwithsysroot/include/compat -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -o /tmp/emscripten_temp_2zqywp51/main_0.o -x c++ main.cpp
clang -cc1 version 17.0.0 based upon LLVM 17.0.0git default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/c++/v1"
ignoring nonexistent directory "/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten"
#include "..." search starts here:
#include <...> search starts here:
/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/SDL2
/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/compat
/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1
/media/cybereality/Thrive/SDK/emsdk/upstream/lib/clang/17/include
/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/include
End of search list.
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/wasm-ld" -o index.wasm /tmp/emscripten_temp_2zqywp51/main_0.o -L/media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libSDL2.a -lGL-webgl2-full_es3 -lal -lhtml5 -lstubs -lnoexit -lc -ldlmalloc -lcompiler_rt -lc++ -lc++abi -lsockets -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --allow-undefined-file=/tmp/tmp8lfn2wz0.undefined --strip-debug --export-if-defined=main --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm --export-if-defined=__start_em_lib_deps --export-if-defined=__stop_em_lib_deps --export-if-defined=__start_em_js --export-if-defined=__stop_em_js --export-if-defined=__main_argc_argv --export=stackSave --export=stackRestore --export=stackAlloc --export=__errno_location --export=getTempRet0 --export=setTempRet0 --export=__get_temp_ret --export=__set_temp_ret --export=__cxa_is_pointer_type --export=__cxa_can_catch --export=setThrew --export=__cxa_free_exception --export=__wasm_call_ctors --export=malloc --export=free --export=__dl_seterr --export=memcpy --export-table -z stack-size=65536 --initial-memory=16777216 --no-entry --max-memory=2147483648 --global-base=1024
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/wasm-emscripten-finalize" --dyncalls-i64 --pass-arg=legalize-js-interface-exported-helpers index.wasm -o index.wasm --detect-features
"/media/cybereality/Thrive/SDK/emsdk/node/14.18.2_64bit/bin/node" /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/src/compiler.js /tmp/tmpvysmeb0x.json
"/media/cybereality/Thrive/SDK/emsdk/upstream/bin/wasm-opt" --strip-dwarf --post-emscripten -O2 --low-memory-unused --zero-filled-memory --pass-arg=directize-initial-contents-immutable --strip-debug --strip-producers index.wasm -o index.wasm --mvp-features --enable-mutable-globals --enable-sign-ext
"/media/cybereality/Thrive/SDK/emsdk/node/14.18.2_64bit/bin/node" /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/tools/acorn-optimizer.js /tmp/emscripten_temp_2zqywp51/index.js JSDCE minifyWhitespace -o /tmp/emscripten_temp_2zqywp51/index.jso1.js
"/media/cybereality/Thrive/SDK/emsdk/node/14.18.2_64bit/bin/node" /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/tools/preprocessor.js /tmp/emscripten_temp_2zqywp51/settings.js simple.html
"/media/cybereality/Thrive/SDK/emsdk/node/14.18.2_64bit/bin/node" /media/cybereality/Thrive/SDK/emsdk/upstream/emscripten/node_modules/.bin/html-minifier-terser index.html -o index.html --collapse-whitespace --collapse-inline-tag-whitespace --remove-comments --remove-tag-whitespace --sort-attributes --sort-class-name --decode-entities --collapse-boolean-attributes --remove-attribute-quotes --remove-redundant-attributes --remove-script-type-attributes --remove-style-link-type-attributes --use-short-doctype --minify-css true --minify-js true