Open Bug 1902520 Opened 2 years ago Updated 3 months ago

www.keisan.nta.go.jp - Firefox is an unsupported browser

Categories

(Web Compatibility :: Site Reports, defect, P3)

Product:
Web Compatibility
Component:
Site Reports
Type:
defect

Tracking

(Webcompat Priority:P3, Webcompat Score:1)

Status:
ASSIGNED
Project Flags:
Webcompat Priority P3
Webcompat Score 1

People

(Reporter: ksenia, Assigned: twisniewski)

References

(Depends on 1 open bug,
URL
)

Details

(6 keywords, Whiteboard: [webcompat-source:web-bugs])

User Story

platform:mac
impact:blocked
configuration:general
affects:all
diagnosis-team:webcompat
branch:release
user-impact-score:0
outreach-assignee:birtles
outreach-contact-date:2025-09-11

Attachments

(5 files, 2 obsolete files)

Bug 1902520 - add a Mac and Windows UA override for keisan.nta.go.jp/kyoutu/ky/sm; r?denschub
48 bytes, text/x-phabricator-request
Details | Review
Bug 1902520 - update our webcompat UA spoofs to use Windows 11 for Chrome and version 26.1 for Safari; r?ksenia
48 bytes, text/x-phabricator-request
Details | Review
image.png
440.38 KB, image/png
Details
Bug 1902520 - add a nightly-only Linux-only UA override for keisan.nta.go.jp and fix Windows override; r?ksenia
48 bytes, text/x-phabricator-request
Details | Review
Bug 1902520 - let our linux webcompat intervention for www.keisan.nta.go.jp ride the trains; r?twisniewski
48 bytes, text/x-phabricator-request
Details | Review

Environment:
Operating system: Mac OS X 10.15
Originally reported Firefox version: Firefox 111.0
Last reproduced with the following UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 13.4; rv:126.0) Gecko/20100101 Firefox/126.0
Platforms reproduced on: mac

Steps to reproduce:

  1. Go to https://www.keisan.nta.go.jp/kyoutu/ky/sm/top_web#bsctrl to file the Japanese Tax
  2. Click on the first item: スマートフォンを使用してe-Tax

Expected:
Be able to use Firefox to file the tax return.

Actual:
This message which says you need to use Safari.

ご利用のブラウザでは、QRコードを利用したマイナンバーカード方式によるe-Taxをご利用になれません。
ブラウザをSafariに切り替えてください。
推奨環境を確認する方はこちら

Actual Behavior:
Forced to use Safari on macOS

Created from https://github.com/webcompat/web-bugs/issues/118144

Webcompat Priority: --- → P3
Webcompat Score: --- → 3
Webcompat Score: 3 → 2

Mass-assigning diagnosis-team to webcompat for "Firefox is not supported" bugs that don't already have a team assigned. This action is done by a script. For your convenience, feel free to filter your bugmail with 559a9604-41ec-11f0-9ec6-f3f21dcd7cf2.

User Story: (updated)

I can still reproduce the Safari-prompt after clicking on the left (はい/yes) button, then the next, the choosing the left button (スマートフォンを使用する). It seems to not allow me through on MacOS with a Chrome UA override, but rather a Safari one. We might need to spoof as Chrome on other OSes, so we'll need to check on all platforms here for an intervention.

User Story: (updated)

I can get past the initial check if I spoof as Chrome on Windows. I managed to get through the initial MyNumber login but I can't confirm everything works without actually submitting a 確定申告.

I think we should attempt to contact the NTA to see why they don't include Firefox as a recommended browser.

Tried to find a suitable point of contact at the NTA today but no luck so far.

Webcompat Score: 3 → 2

Can I ask you to make a sitepatch for this? As per comment 2 and comment 3, it looks like we want to spoof Safari on Mac and Chrome (or Edge) on Windows.

Flags: needinfo?(twisniewski)

Yes, I'll make a sitepatch for Windows and Mac only, since they don't seem to support Linux or Android even with Chrome.

Flags: needinfo?(twisniewski)
Keywords: leave-open
Assignee: nobody → twisniewski
Status: NEW → ASSIGNED
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/c1ba184ae9fb https://hg.mozilla.org/integration/autoland/rev/5f417cf75ea8 add a Mac and Windows UA override for keisan.nta.go.jp/kyoutu/ky/sm; r=webcompat-reviewers,ksenia
User Story: (updated)
Webcompat Score: 2 → 1

They've updated their minimum version checks, breaking our intervention. The Safari version we use is now too old, and they also check for Windows 10 in the UA string for Chrome, requiring 11. We'll need to update our code appropriately.

Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/80e6caf3565d https://hg.mozilla.org/integration/autoland/rev/f2db594beff4 update our webcompat UA spoofs to use Windows 11 for Chrome and version 26.1 for Safari; r=ksenia,webcompat-reviewers
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/e4ad09fb593f https://hg.mozilla.org/integration/autoland/rev/dff53082740c update our webcompat UA spoofs to use Windows 11 for Chrome and version 26.1 for Safari; r=ksenia,webcompat-reviewers
Attachment #9536367 - Attachment is obsolete: true
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/ac2dcd7b5abb https://hg.mozilla.org/integration/autoland/rev/7ef206c59412 update our webcompat UA spoofs to use Windows 11 for Chrome and version 26.1 for Safari; r=ksenia,webcompat-reviewers
Attached image image.png —

With sitepatch enabled, the site directed me to install the Chrome version of the Myna Portal app and extension.

Note that the Myna Portal app and extension has a Firefox version, but NTA does not instruct me to install the Firefox version because they do not officially support Firefox and we are spoofing the UA.

If I already installed the Firefox version of Myna Portal app and extension, I am able to proceed to the next screen.

Duplicate of this bug: 2019933

(In reply to Thomas Wisniewski [:twisniewski] from comment #7)

Yes, I'll make a sitepatch for Windows and Mac only, since they don't seem to support Linux or Android even with Chrome.

Hi,

I recently opened a Linux compatibility issue (https://github.com/webcompat/web-bugs/issues/208836), which was eventually moved to bug 2019933 and marked as a duplicate of this one.
Since this bug is now the primary landing spot for Linux support, I wanted to reiterate a suggestion from the webcompat thread: would OS spoofing be a viable intervention here? Given that we already use interventions like change_OS_to_MacOSX, perhaps a similar sitepatch could enable support for Linux users as well.

(In reply to Akihiko Odaki from comment #21)

I recently opened a Linux compatibility issue (https://github.com/webcompat/web-bugs/issues/208836), which was eventually moved to bug 2019933 and marked as a duplicate of this one.

Bug 2019933 has " Platform: Desktop Windows 11". Moreover, bug 2019933 comment #0 says

Operating system: Windows 11 and Mac
Firefox version: Firefox 147.0

Blame @rbucata for poor treatment of the platform.

(In reply to Akihiko Odaki from comment #21)

(In reply to Thomas Wisniewski [:twisniewski] from comment #7)
would OS spoofing be a viable intervention here? Given that we already use interventions like change_OS_to_MacOSX, perhaps a similar sitepatch could enable support for Linux users as well.

I'm hesitant to do so, as the site blocks Linux specifically. It's a site related to taxes, and I wouldn't want folks to run into weird issues while filing taxes, and I cannot test everything on the site to confirm if it truly works well. That said, I can add a spoof to nightly builds of Firefox for you to test? If you can confirm that the site seems to work to do what it's intended to do, that might help us make a decision.

(In reply to Thomas Wisniewski [:twisniewski] from comment #23)

(In reply to Akihiko Odaki from comment #21)

(In reply to Thomas Wisniewski [:twisniewski] from comment #7)
would OS spoofing be a viable intervention here? Given that we already use interventions like change_OS_to_MacOSX, perhaps a similar sitepatch could enable support for Linux users as well.

I'm hesitant to do so, as the site blocks Linux specifically. It's a site related to taxes, and I wouldn't want folks to run into weird issues while filing taxes, and I cannot test everything on the site to confirm if it truly works well. That said, I can add a spoof to nightly builds of Firefox for you to test? If you can confirm that the site seems to work to do what it's intended to do, that might help us make a decision.

I'm willing to test if it helps. Thanks.

Attachment #9549303 - Attachment description: Bug 1902520 - add a nightly-only Linux-only UA override for keisan.nta.go.jp; r?ksenia → Bug 1902520 - add a nightly-only Linux-only UA override for keisan.nta.go.jp and fix Windows override; r?ksenia
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/3a9e38c433a6 https://hg.mozilla.org/integration/autoland/rev/fec040a378fa add a nightly-only Linux-only UA override for keisan.nta.go.jp and fix Windows override; r=webcompat-reviewers,denschub

Reverted this because it was causing mochitests failures in browser_ua_helpers.js.

  • Revert link
  • Push with failures
  • Failure Log
  • Failure line: TEST-UNEXPECTED-FAIL | browser/extensions/webcompat/tests/browser/browser_ua_helpers.js | test_ua_helpers - getDeviceAppropriateChromeUA({"ua":"Linux","config":{"OS":"windows","noFxQuantum":true},"expected":"Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36"}) - Got "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36",
User Story: (updated)
Flags: needinfo?(twisniewski)

Oops, silly oversight. Re-landing.

Flags: needinfo?(twisniewski)
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/4a0756cfa5e7 https://hg.mozilla.org/integration/autoland/rev/a4a4e4b825ca add a nightly-only Linux-only UA override for keisan.nta.go.jp and fix Windows override; r=webcompat-reviewers,denschub

FWIW, I was able to go through filing my taxes on this site on Linux with nightly. Would it make sense to extend the override to all branches?

(In reply to Pulsebot from comment #26)

Pushed by twisniewski@mozilla.com:
https://github.com/mozilla-firefox/firefox/commit/3a9e38c433a6
https://hg.mozilla.org/integration/autoland/rev/fec040a378fa
add a nightly-only Linux-only UA override for keisan.nta.go.jp and fix
Windows override; r=webcompat-reviewers,denschub

Perfherder has detected a awsy performance change from push fec040a378fa5998b31d61e74fe73dc2ecbb4fc5.

No action is required from the author; this comment is provided for informational purposes only.

Improvement Test Platform Options Absolute values [old vs new]
0.26% Base Content JS (doc) windows11-64-24h2-shippable fission 1,517,873.33 bytes -> 1,513,960.00 bytes

Need Help or Information?

If you have any questions, please reach out to fbilt@mozilla.com. Alternatively, you can find help on Slack by joining #perf-help, and on Matrix you can find help by joining #perftest.

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests.

Keywords: perf-alert
Flags: needinfo?(twisniewski)
Attachment #9558334 - Attachment is obsolete: true
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/b7bb799b3b55 https://hg.mozilla.org/integration/autoland/rev/3ce4145d65b1 let our linux webcompat intervention for www.keisan.nta.go.jp ride the trains; r=twisniewski,webcompat-reviewers
Pushed by agoloman@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/0945b11c62f3 https://hg.mozilla.org/integration/autoland/rev/1e94be78eef4 Revert "Bug 1902520 - let our linux webcompat intervention for www.keisan.nta.go.jp ride the trains; r=twisniewski,webcompat-reviewers" for causing mochitest failures @test_persistent_contentscripts.py.

Backed out for causing mochitest failures @test_persistent_contentscripts.py.

Ah, we will fix the issue and re-land today.

Flags: needinfo?(twisniewski)
Pushed by twisniewski@mozilla.com: https://github.com/mozilla-firefox/firefox/commit/f9e2f5ae1215 https://hg.mozilla.org/integration/autoland/rev/cc6f666d4813 let our linux webcompat intervention for www.keisan.nta.go.jp ride the trains; r=twisniewski,webcompat-reviewers
See Also: → 2038987

It seems like the intervention is broken here. I'm only able to use Edge on Win11. Even Chrome seems to gets rejected.

Indeed my automated test seems to be failing now for Linux and Windows, yet still passes on MacOS.

Ah, this was a bug I introduced in bug 2039461. It isn't running the content-scripts that it generates in the right order for this intervention. Thankfully it seems like this is the only site affected, and the fix is straightforward (I'll do it in bug 2046904).

@jrmuizel, okay I've landed the fix, so this intervention should start working again on windows and linux on the next nightly. It will make it into 153, and if we feel strongly enough to push it into a 152 dot release, let me know.

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