diff --git a/qt/aqt/editor.py b/qt/aqt/editor.py
index 344256059..9dc56488e 100644
--- a/qt/aqt/editor.py
+++ b/qt/aqt/editor.py
@@ -1260,14 +1260,6 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
     def insertMathjaxChemistry(self) -> None:
         self.web.eval("wrap('\\\\(\\\\ce{', '}\\\\)');")
 
-    def toggleMathjax(self) -> None:
-        self.mw.col.set_config(
-            "renderMathjax", not self.mw.col.get_config("renderMathjax", False)
-        )
-        # hackily redraw the page
-        self.setupWeb()
-        self.loadNoteKeepingFocus()
-
     def toggleShrinkImages(self) -> None:
         self.mw.col.set_config(
             "shrinkEditorImages",
@@ -1309,7 +1301,6 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
             mathjaxInline=Editor.insertMathjaxInline,
             mathjaxBlock=Editor.insertMathjaxBlock,
             mathjaxChemistry=Editor.insertMathjaxChemistry,
-            toggleMathjax=Editor.toggleMathjax,
             toggleShrinkImages=Editor.toggleShrinkImages,
             toggleCloseHTMLTags=Editor.toggleCloseHTMLTags,
             addImageForOcclusion=Editor.select_image_and_occlude,
diff --git a/qt/aqt/mediasrv.py b/qt/aqt/mediasrv.py
index 8c557bbc7..eed93f901 100644
--- a/qt/aqt/mediasrv.py
+++ b/qt/aqt/mediasrv.py
@@ -33,6 +33,7 @@ import aqt.operations
 from anki import frontend_pb2, generic_pb2, hooks
 from anki.collection import OpChanges, OpChangesOnly, Progress, SearchNode
 from anki.decks import UpdateDeckConfigs
+from anki.errors import NotFoundError
 from anki.scheduler.v3 import SchedulingStatesWithContext, SetSchedulingStatesRequest
 from anki.utils import dev_mode
 from aqt.changenotetype import ChangeNotetypeDialog
@@ -654,6 +655,17 @@ def set_meta_json() -> bytes:
     return set_setting_json(aqt.mw.pm.meta.__setitem__)
 
 
+def get_config_json() -> bytes:
+    try:
+        return get_setting_json(aqt.mw.col.conf.get_immutable)
+    except NotFoundError:
+        return generic_pb2.Json(json=b"null").SerializeToString()
+
+
+def set_config_json() -> bytes:
+    return set_setting_json(aqt.mw.col.set_config)
+
+
 post_handler_list = [
     congrats_info,
     get_deck_configs_for_update,
@@ -674,6 +686,7 @@ post_handler_list = [
     set_profile_config_json,
     get_meta_json,
     set_meta_json,
+    get_config_json,
 ]
 
 
@@ -723,6 +736,8 @@ exposed_backend_list = [
     # CardRenderingService
     "encode_iri_paths",
     "decode_iri_paths",
+    # ConfigService
+    "set_config_json",
 ]
 
 
diff --git a/ts/lib/tslib/profile.ts b/ts/lib/tslib/profile.ts
index b54d4eed8..1893d3b82 100644
--- a/ts/lib/tslib/profile.ts
+++ b/ts/lib/tslib/profile.ts
@@ -1,7 +1,14 @@
 // Copyright: Ankitects Pty Ltd and contributors
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
-import { getMetaJson, getProfileConfigJson, setMetaJson, setProfileConfigJson } from "@generated/backend";
+import {
+    getConfigJson,
+    getMetaJson,
+    getProfileConfigJson,
+    setConfigJson,
+    setMetaJson,
+    setProfileConfigJson,
+} from "@generated/backend";
 
 async function getSettingJson(key: string, backendGetter: (key: string) => Promise<any>): Promise<any> {
     const decoder = new TextDecoder();
@@ -34,3 +41,15 @@ export async function getMeta(key: string): Promise<any> {
 export async function setMeta(key: string, value: any): Promise<void> {
     return await setSettingJson(key, value, async (k, v) => await setMetaJson({ key: k, valueJson: v }));
 }
+
+export async function getColConfig(key: string): Promise<any> {
+    return await getSettingJson(key, async (k) => await getConfigJson({ val: k }));
+}
+
+export async function setColConfig(key: string, value: any): Promise<void> {
+    return await setSettingJson(
+        key,
+        value,
+        async (k, v) => await setConfigJson({ key: k, valueJson: v, undoable: true }),
+    );
+}
diff --git a/ts/routes/editor/NoteEditor.svelte b/ts/routes/editor/NoteEditor.svelte
index dfed151ce..f5e3f62f6 100644
--- a/ts/routes/editor/NoteEditor.svelte
+++ b/ts/routes/editor/NoteEditor.svelte
@@ -448,7 +448,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         decodeIriPaths,
     } from "@generated/backend";
     import { wrapInternal } from "@tslib/wrap";
-    import { getProfileConfig, getMeta, setMeta } from "@tslib/profile";
+    import { getProfileConfig, getMeta, setMeta, getColConfig } from "@tslib/profile";
     import Shortcut from "$lib/components/Shortcut.svelte";
 
     import { mathjaxConfig } from "$lib/editable/mathjax-element.svelte";
@@ -643,8 +643,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         toolbar.inlineButtons?.setColorButtons([lastTextColor, lastHighlightColor]);
         setTags(tags);
         setTagsCollapsed(await getMeta(tagsCollapsedMetaKey));
-        // TODO: renderMathjax col config
-        setMathjaxEnabled(true);
+        setMathjaxEnabled((await getColConfig("renderMathjax")) ?? true);
         // TODO: shrinkEditorImages col config
         setShrinkImages(true);
         // TODO: closeHTMLTags col config
diff --git a/ts/routes/editor/editor-toolbar/OptionsButton.svelte b/ts/routes/editor/editor-toolbar/OptionsButton.svelte
index b3c54ed0f..31ed19328 100644
--- a/ts/routes/editor/editor-toolbar/OptionsButton.svelte
+++ b/ts/routes/editor/editor-toolbar/OptionsButton.svelte
@@ -17,6 +17,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import { mathjaxConfig } from "$lib/editable/mathjax-element.svelte";
     import { shrinkImagesByDefault } from "../image-overlay/ImageOverlay.svelte";
     import { closeHTMLTags } from "../plain-text-input/PlainTextInput.svelte";
+    import { setColConfig } from "@tslib/profile";
 
     let showFloating = false;
 
@@ -28,7 +29,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     function toggleShowMathjax(_evt: MouseEvent): void {
         mathjaxConfig.enabled = !mathjaxConfig.enabled;
-        bridgeCommand("toggleMathjax");
+        setColConfig("renderMathjax", mathjaxConfig.enabled);
+        // FIXME: refresh
     }
 
     function toggleCloseHTMLTags(_evt: MouseEvent): void {