Update metamask on the Firefox extensions list

### What is this about?

[Metamask on Firefox](https://addons.mozilla.org/en-US/firefox/addon/ether-metamask/) is on version 12.6.2 instead of the latest 12.13 on Chrome. This causes many issues. For us this is limiting our ability to have a secure CSP.

Some issues which would be solved:
- https://github.com/MetaMask/detect-provider/issues/31
- https://github.com/MetaMask/metamask-extension/issues/30263
- https://github.com/MetaMask/metamask-extension/issues/30785

### Scenario

_No response_

### Design

_No response_

### Technical Details

_No response_

### Threat Modeling Framework

_No response_

### Acceptance Criteria

_No response_

### Stakeholder review needed before the work gets merged

- [ ] Engineering (needed in most cases)
- [ ] Design
- [ ] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

_No response_

The issue names no files, tests, or entry points. Start by locating how Firefox extension versions or release metadata are maintained, then compare the Firefox listing at addons.mozilla.org with the Chrome version cited in the issue; done means the Firefox listing reflects the requested newer MetaMask version and the relevant checks pass.

Written by the indexing model from the issue text.