Change Details

**Steps to replicate the issue**: * Open https://en.m.wikipedia.org/wiki/Special:MobileOptions * Toggle "Advanced mode" * The page reloads **What happens?**: The toggle hasn't changed. On Chromium, the toggle does change if you refresh the page. On Firefox it doesn't. **What should have happened instead?**: The option gets toggled. **Other information**: It appears the page tries to reload itself BEFORE the options API request is sent, which cancels the request. You can confirm this by running `addEventListener('beforeunload', e=>e.preventDefault());` in browser console while XHRs are logged.

**Steps to replicate the issue**: * Open https://en.m.wikipedia.org/wiki/Special:MobileOptions * Toggle "Advanced mode" * The page reloads **What happens?**: The toggle hasn't changed. On Chromium, the toggle does change if you refresh the page. On Firefox it doesn't. **What should have happened instead?**: The option gets toggled. **Other information**: It appears the page tries to reload itself BEFORE the options API request is sent, which cancels the request. You can confirm this by running `addEventListener('beforeunload', e=>e.preventDefault());` in browser console while XHRs are logged. == QA Results - Beta | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ✅ | T357212#9540298 | == QA Results - Prod | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ✅ | T357212#9540313 |

**Steps to replicate the issue**: * Open https://en.m.wikipedia.org/wiki/Special:MobileOptions * Toggle "Advanced mode" * The page reloads **What happens?**: The toggle hasn't changed. On Chromium, the toggle does change if you refresh the page. On Firefox it doesn't. **What should have happened instead?**: The option gets toggled. **Other information**: It appears the page tries to reload itself BEFORE the options API request is sent, which cancels the request. You can confirm this by running `addEventListener('beforeunload', e=>e.preventDefault());` in browser console while XHRs are logged. == QA Results - Beta | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ✅ | T357212#9540298 | == QA Results - Prod | **AC** | **Status** | **Details** | | ----- | ----- | ----- | | 1 | ✅ | T357212#9540313 |