fix: crashing after bridge tx in Firefox

[infiniteflower]

Description

This PR fixes an issue in Firefox only where the Extension would crash after submitting a bridge tx and would not be able to recover after a restart, forcing the user to wipe the Extension completely to fix it.

Related issues

Fixes: #29630

Manual testing steps

1. If you have experienced this crash in FF before, start from a fresh install of the Extension
2. Submit a bridge tx
3. The app should not crash

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [e11652d]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1682 ± 85 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1479	2105	1682	174	83
		domContentLoaded	1419	2091	1646	172	83
		load	1480	2121	1682	177	85
		domInteractive	24	125	45	25	12
		backgroundConnect	9	84	34	22	10
		firstReactRender	16	99	47	33	16
		getState	5	80	21	22	11
		initialActions	0	1	0	0	0
		loadScripts	1038	1633	1238	150	72
		setupStore	6	91	24	27	13
		uiStartup	1652	2650	2016	263	126

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 43 Bytes (0.00%)
• ui: 146 Bytes (0.00%)
• common: 0 Bytes (0.00%)